Quilts Under the Microscope

Quilts Under the Microscope

Quilts Under the Microscope Photo

Quilts and other heirloom textiles are important artifacts that can represent the history of a person, a family, a community, or a country. Preserving them is a way to maintain an important link to the past. Unfortunately, there are many agents, both natural and human-made, that can slowly (or quickly!) destroy these pieces of our history. The exhibition Quilts Under the Microscope presents a group of quilts that, after careful study, divulge some of the secrets of their past and help us determine the best to way to safeguard them for the future.

Curated by Marin Hanson and Patricia Crews with the curatorial assistance of the students in University of Nebraska-Lincoln’s graduate-level Care and Conservation of Textiles course, the exhibition introduces museum visitors to the ways in which institutions like the International Quilt Museum use science and technical analysis to discover the history of objects and to inform the museum's activities of preservation, interpretation, and display. Visitors learn how they can take care of their families' valued quilts and textiles in their own homes, to ensure that these heirlooms survive well into the future

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Textile Protection & Preservation

Textile Protection & Preservation
Textile Protection & Preservation

Using tools like microscopes, magnifying lenses, and high-resolution digital cameras to closely examine antique quilts and textiles can reveal a great deal about their past and help us determine the best way to safeguard them—and other textiles like them—for the future.

Why should we preserve quilts and other heirloom textiles?
Textiles are an integral part of our daily lives and an important part of our cultural heritage. They can tell us about the people and cultures that came before us. They delight and inspire us. Many textiles have personal meaning; perhaps they were made by a close relative or family friend, or possibly owned by a prominent community member. Knowledge of handmade textile techniques is disappearing in our increasingly mechanized world. Consequently, preserving rare examples is ever more important.

What damages textiles?
Fluctuating temperature and humidity, light, pests and careless handling are all damaging to textiles. We can slow deterioration by controlling temperature and humidity and protecting them from prolonged light exposure. Artifacts should be checked regularly to guard against insect or pest damage, stored in archival materials and handled gently and carefully.

The objects in this exhibition are made of plant fibers, such as cotton or linen, and animal fibers, like wool or silk, which naturally break down over time. Some contain “inherent vices” - e.g. harmful dyes and chemicals applied during their production; objects with these inherent vices cannot be saved by human intervention. However, their inevitable deterioration can be slowed through proper care.

How can we protect textiles?
Museums devote a large portion of their resources to preserving objects for future generations. Staff members and volunteers receive special training in the care of textiles. Facilities are designed with preservation in mind; exhibition and storage areas are climate controlled and monitored for safe light levels and pests. Objects are stored and exhibited using specialized storage and exhibition materials.

At home, while duplicating museum conditions would be difficult, there are some steps and precautions owners of treasured textiles can take to protect and prolong the life of their heirlooms. One simple rule is to store cherished quilts in the same type of environment you are comfortable in, not in a garage, attic or basement; the temperatures in these spaces fluctuate greatly and can cause damage. Limit the amount of time you display a textile and never place it in direct sunlight

Works in the Exhibition

Works in the Exhibition

Whole Cloth Quilt
Possibly made by
Molly Dewey in New York
Circa 1790-1810
88 x 80.5 inches
2005.046.0001E

While all quilts are susceptible to deterioration due to normal use, wool quilts have an additional adversary: the clothes moth.  It is a small insect that is about one fourth of an inch long and its scientific name is Tineola bisselliella.  Actually it is the moth larvae which damage woolen quilts by feeding on the protein in woolen fibers.  They are especially attracted to soiled fabrics and prefer dark, quiet areas.

All new acquisitions to the International Quilt Study Center are inspected for any signs of moth activity and vacuumed before being stored with the collection.  While vacuuming may eliminate some insects and destroy a portion of the eggs, it is not enough to eliminate them entirely.  

If live larvae are found, current recommended treatments for moth infestations include freezing the textile.  After wrapping it in muslin or acid-free tissue paper (to absorb any moisture condensation), the textile is rapidly frozen and left for at least one week to ensure that all moths, larvae, and eggs are killed.  Moth balls (volatile pesticides) are not recommended because they have proven harmful to humans.  

The production of woolen fabrics during Colonial and early American days was a time consuming task involving several steps, which took place in the homes of textile workers specializing in the various processes. Some citizens of the new republic were skilled spinners and weavers, but most had to rely on others to process the wool from their sheep.  For example, they might take their wool to one person to be carded, combed and spun into yarn.  Next, the yarn would be taken to another specialist to be woven into cloth.  Still a third specialist might be hired to dye the cloth.  In New England this was the typical state of textile production at the end of the 18th century.  The other option was to purchase fabric (largely imported) from mercantile shops. Wearing domestically produced fabric, however, was a source of pride and patriotism for new Americans.  While more money was spent on foreign-made textiles during the 18th century, within one hundred years, New England would become a major center of textile manufacture.  More than 3000 textile mills eventually developed throughout the eastern United States, producing both wool and cotton products. 

Woven Coverlet
Made in the U.S.
75.5 x 66 inches
2003.003.0403E

The production of woolen fabrics during Colonial and early American days was a time consuming task involving several steps, which took place in the homes of textile workers specializing in the various processes. Some citizens of the new republic were skilled spinners and weavers, but most had to rely on others to process the wool from their sheep.  For example, they might take their wool to one person to be carded, combed and spun into yarn.  Next, the yarn would be taken to another specialist to be woven into cloth.  Still a third specialist might be hired to dye the cloth.  In New England this was the typical state of textile production at the end of the 18th century.  The other option was to purchase fabric (largely imported) from mercantile shops. Wearing domestically produced fabric, however, was a source of pride and patriotism for new Americans.  While more money was spent on foreign-made textiles during the 18th century, within one hundred years, New England would become a major center of textile manufacture.  More than 3000 textile mills eventually developed throughout the eastern United States, producing both wool and cotton products. 

Woven wool coverlets, such as the one you see here, were popular during Colonial and early American times (1600 – 1800).  This one is reversible and is in relatively good condition.  However, it would not be advisable to hang a textile of this type due to the strain that would be placed on it.  

Joseph’s Coat (Mennonite)
Possibly made in Ohio
Circa 1920
86.5 x 74.25 inches
2008.040.0029

This quilt’s pattern and saturated, solid colors are typical of quilts made by Mennonite and Amish women.  Colors in Amish and Mennonite quilts usually reflect those used in their clothing because their quilts are made largely from fabric scraps left from sewing family clothing.  Their lives and dress are governed by their ordnungen, or “rules for living.”  These rules change over time and vary from one congregation to another, but generally dictate dress of dark, solid colors—blues, greens, greys, purples, blacks and browns.  Red, orange and yellow colors typically were forbidden for clothing, but allowed in quilts by some congregations.  Dressing in similar styles of clothing and using a prescribed set of dark colors was, and remains, one way the Amish and Mennonite stayed connected with each other and built strong communities. 

Although we do not know where this quilt was made, it came into the collection with a Mennonite attribution and Pennsylvania and Ohio are the two states with the greatest concentrations of Amish and Mennonite believers.  Several distinguishing features support its Mennonite attribution and further point to it being made in Ohio.  First, a dark cotton print was used to back the quilt.  Amish were not allowed to wear printed fabrics—they were deemed too showy; whereas Mennonite women were allowed subdued dark prints.  Second, the quilt’s rectangular shape and cotton fabrics point to Ohio.  Ohio Amish and Mennonite women used cotton fabrics in their quilts more often than wool and favored a rectangular format.  Woolen fabrics in a square format were favored by the Pennsylvania Amish and Mennonites. 

Bonnet (Amish)
Made in the U.S.
Circa 1930-1950
2004.008.0002


Fading is caused by a combination of light exposure, high temperatures, humidity and poor air quality. The most damage occurs when textiles are exposed to light for a long period of time. This is noticeable in the green stripes and horizontal fade line of this quilt. This fade line could have been caused by the quilt being folded and stored for a long time next to a window. This bonnet also shows evidence of light damage, with one half appearing darker in color than the other. Keeping textiles away from direct light exposure and setting lights on low can help avoid this type of damage.

Ruth and Naomi Quilt
Charles Pratt (1851-1941)
Philadelphia, Pennsylvania
Circa 1930-1940
86 x 77.5 inches
2005.020.0001

This early 20th century quilt is the victim of silk shattering, an inherent vice that is the result of irreversible chemical damage caused by the process of weighting silks.  The degree to which the fabric has deteriorated can be seen along the image’s horizon line where conservators carefully added a silk crepeline overlay to reinforce the fragile area and prevent further fabric loss.  Where silk shattering was complete, a colored underlay was added to simulate its former beauty.  The edges were rebound in navy blue bias strips and the entire quilt top was stitched to an inner muslin backing to provide stability. 

Ruth and Naomi is just one of a series of quilts Charles Pratt of Philadelphia made over a period of 56 years. He often recreated Biblical scenes, like this one—which depicts the tale of a faithful daughter-in-law. Ruth and Naomi is composed of 30,400 half-inch squares and Mr. Pratt once estimated that he spent around 2,000 hours sewing them together.

 

Quilted Petticoat
Made in the United Kingdom
Circa 1740-1760
2005.032.0002

For any woman of status in the 18th century, a quilted petticoat was an important part of her wardrobe.  This closet staple was worn over several other petticoats and was visible where the dress’ overskirt was left open in the front to showcase the fine quilting.  Often the petticoat’s backing or lining was a wool calamanco which provided warmth as well as structure to the unweighted silks of this period.  Eventually the quilted petticoat went out of style, but some of these special garments survive intact and some survive as petticoat quilts—petticoats  recycled into whole cloth quilts.

Signature Album Quilt
Made in Boston, Massachusetts
Dated 1850-1851
Multiple signatures
93 x 83 inches
1997.007.0859


The use of ink, instead of embroidery, to sign blocks for signature quilts became very popular from the 1830s to the 1890s. During this time both homemade and store bought inks were used. Unfortunately, many of the inks were highly acidic. Common 19th century ink recipes called for ferrous sulfate, nutgalls, sulfuric acid and a plant gum—all of which are acidic compounds. Cellulosic fibers such as cotton and linen are easily degraded by acids, in a process called hydrolysis. Hydrolysis causes the fibers to lose flexibility and weaken over time. Heavy use and oxygen in the air further accelerate ink degradation. 

Nothing can be done to stop the ink from destroying the fabric. Consequently, the most important task is to accurately record the information that is legible before further deterioration results in the complete loss  of an inscription. Taking clear photographs of each inscription for future reference and compiling written records of the inked signatures are two good methods for preserving the information.

Signature quilts are special because they contain inscriptions that may provide clues that researchers can use to learn more about them. The oldest known signature quilts date from the 1830s, and some continued to be made into the twentieth century. However, signature quilts were at the height of popularity between the 1840s and 1860s.

Inscriptions on signature quilts can be as simple as a set of initials, but often include names, verses, poems, locations and dates. By researching the inscriptions, it is sometimes possible to deduce who made the quilt and possibly determine when and why they made it. The inscriptions may be embroidered, inked, stamped, or stenciled. In many cases, including this quilt, more than one technique was used. Can you locate the three inscription techniques used on this quilt? 

Pillow Shams
Probably made in the U.S.
Early 19th century
34 x 18 inches
2008.040.0265.01 and .02

Note the location of the fold damage on these glazed chintz pillow cases. Years of being stored folded into quarters have damaged these pieces irrevocably. Proper storage techniques could have prevented this unfortunate condition.  Folding fabric repeatedly along the same lines stresses and strains the fibers and eventually weakens them, resulting in deterioration of the yarns and permanent creases and fractures of the fabric along the fold lines. Museums combat fold damage by storing items flat and unfolded, if possible. If an item must be folded for storage, museum personnel pad the folds with crumpled tissue paper. The private owner can minimize the risk of fold damage by folding items off the normal fold axis, i.e. off center or in thirds, and refolding them periodically along different lines. If items must be stacked when stored then heavier items should be placed at the bottom of the stack. 

Throughout history, people have used pigments and dyes to add color to the textiles in their lives. Weaving, dyeing, painting and printing are the most common techniques for creating colorful designs on fabrics. The advent of roller printing at the end of the 18th century revolutionized the production of colorful textiles. At first only a single color could be printed and large motifs were used. As technology progressed more colors were added, like in these chintz pillow cases. As the 19th century passed large prints became smaller and more varied, giving us multicolored calicoes, like the one in the blue dress on the mannequin.

Oak Leaf
Possibly made in New York
Dated May 2, 1841
Signed “Sally Conklin”
82 x 94.5 inches
1997.007.0876

Dyeing and printing of textiles is a complicated process.  Red calicoes were frequently achieved by dyeing the ground red using madder in a Turkey red process, then removing or discharging the red color in some areas by printing them with a bleach compound. Turkey red discharge prints could be illuminated with other colors instead of leaving the discharged areas white.  For example, blue and yellow were often added to the white areas.  If the discharge printed fabric was not properly rinsed to remove the chlorine bleaching agent, or if the bleach was too strong, it weakened the fabric, resulting in complete disintegration of the white areas over time. 

Properly caring for the textile will slow this process, but cannot entirely stop the deterioration.  Closely regulating  temperature and humidity and reducing light levels and length of light exposure will slow the chemical reactions that result in fabric degradation.

Cut-out Chintz Medallion
Made in the U.S.
Circa 1830-1850
104 x 102.5 inches
1997.007.0841

What color are the disintegrating areas of both this quilt and the child’s dress behind you? It is the brown areas – the fine stripes in the dress and the background of some of the chintz appliqué fabrics in the quilt. The brown fabrics are breaking down because an iron mordant was used in the dyeing and printing process.

To create affinity between fiber and dye, an iron mordant (ferrous sulfate) was used in specific parts of the fabric’s pattern. When iron mordanted fabrics are not rinsed properly, the residual iron serves as a catalyst and causes oxidative degradation resulting in fabric decomposition. The weakened fabric may be stabilized with netting or a sheer fabric underlay or overlay, but there is no way to stop the decomposition. 

Initially imported textiles from India, chintzes were colorful cotton fabrics in great demand for clothing and furnishings.  The prohibition of printed cotton imports from India in 1701 in England sparked the development of a textile printing industry. Without easy access to the colorful Indian prints, women carefully used every scrap of the fabric. Inspired by the palampore, an expensive Indian bedcover, American women cut apart chintz designs and   appliquéd them to a plain cotton ground to make the expensive chintz go farther. Cut-out chintz appliqué quilts became very popular between 1820 and 1840.

Mexican Rose
Possibly made in Kansas
Circa 1850-1870
93.5 x 75 inches
1997.007.0484

The Mexican Rose quilt, as it appeared in Robert Bishop’s 1975 publication, New Discoveries in American Quilts. Large white holes can be seen in the flower petals where the bleach discharge and mordants used in the printing process have disintegrated the fabric. 

Mordant Damage
Dyeing and printing on textiles is a complicated process.  Not all dyes will adhere to all types of fibers.  Mordants were required to fix natural dyes onto both cotton and wool fabrics. Unfortunately, iron mordants are corrosive and eventually causes the fibers to degrade.  Holes begin to form causing the fabric to weaken.  Dark colors such as brown and black are often the first affected because the iron mordant and tannic acid used to achieve these colors are especially damaging  to cellulosic fibers like cotton.

Properly caring for the textile will slow this process, but cannot entirely stop the deterioration caused by some mordants.  Closely regulating  temperature and humidity and reducing light levels and length of exposure will slow the chemical reactions that break the molecular bonds between mordant and fiber resulting in fabric degradation. 
19th Century Printing and Dyeing

The Industrial Revolution had profound effects on printing techniques.  Copper plate and engraved cylinder (also called roller) printing replaced the laborious hand block printing.  Roller printing improved as the demand for calico prints increased.  Once printers realized that they could combine mordants with the dyestuffs, then apply the thickened dyestuffs using engraved copper rollers, they quickly progressed to a system that allowed them to print multiple colors simultaneously using a separate cylinder for each color.  This new process simplified and expedited textile printing.
Prior to the last half of the 19th century, all dyes were made from vegetable or mineralcompounds.  Although Sir William Perkin discovered the first synthetic dye—mauvine—in 1856, and additional synthetic dyes followed, nevertheless natural dyes remained in widespread use until the early 20th century because they were more colorfast than the early synthetic dyes.  Natural dyes used in coordination with a mordant widened the available range of colors.  Multiple mordants (usually alum, iron, and tin salts) could be printed onto the same fabric to expedite the process.  When the mordant-printed fabric was immersed in the dyebath, the natural dyes reacted to each mordant by producing a different color.  Thus, multi-colored fabrics were more easily and inexpensively produced.  Advances like this in both dyeing and printing technology transformed the textile industry.

RESTORATION OF THE FLOWER PETALS
Around 1980, the owner of this quilt at that time, an antiques dealer, decided to cover the severely damaged flower petals with a solid red fabric. He did an excellent job, so good in fact that only after a student here at the Quilt Center researched the publication history of the quilt and found the photograph shown below did we discover that the quilt had been altered. A single solid red petal has been removed to reveal the original fabric underneath—can you find it?

Works in the Exhibition

Gallery Photos

Gallery Photos
Gallery Photos
This exhibition was made possible through funding from Friends of the International Quilt Museum and the Nebraska Arts Council and the Nebraska Cultural Endowment. The Nebraska Arts Council, a state agency, has supported this exhibition through its matching grants program funded by the Nebraska Legislature and the National Endowment for the Arts, and the Nebraska Cultural Endowment. Visit www.artscouncil.nebraska.gov for more information.
Event Date
Friday, April 2, 2010 to Monday, November 1, 2010