I hope you will forgive a tech blog today. I’ve been unable to reach the studio for several days this week and I don’t have the normal weeks’ process to show you.

While I was working on all those silk leaves I added a candle to my studio.

Don was appalled. And he’s right. Fabric and fire don’t mix.

But fire does bring everything to its elements.

Silk leaves aren’t silk. They’re usually polyester of some sort. I can’t bring myself to care about that. They’re too pretty.

I was cutting the leaves apart to make smaller leaves. Of course, on the better quality leaves they heat the edges so they melt a little and don’t fray. I set up a candle to melt the edges of the parts I cut.

Boy, does polyester burn. Really fast, too. I set my candle in a container, put the candle into a tray of water, and ran the leaf edges through the flames. If they started to burn, I could drop the leaves into the water as a safety thing. You can hold the leaves with tweezers, but you still can’t control them once they start to burn. Being poly, they drip dry with their edges fused. If they blacken a bit, it makes them even more like fall leaves.

The same setup for this makes it safe to burn test fabric as well.

Burn testing has been around forever. It’s hard to tell fibers just by feel. Even if you’re very experienced. If you burn a small sample you can tell at once a lot about the fiber the fabric is made from.

Cotton burns to a soft fine white ash. Rayon burns black but also has a soft ash. Wool stinks like burnt hair. Polyester usually melts to a hard black edge. Nylon melts to a hard white edge. Silk burns to a hard crunchy edge.

It’s not foolproof, but it does tell you the most important thing about fiber. Is it plant, animal, or vegetable? Why does that matter?

It answers questions: will it dye? Will it fade? Will it shrink? Will it melt? You don’t need precision for that. You need to know if it’s synthetic or natural.

Synthetics, nylon, or poly will melt. They won’t shrink, bleed or fade. But they can’t be dyed except with dyes, especially for them.

Cotton, linen, bamboo, and rayon are all plant fibers. They dye beautifully with fiber-reactive dyes. But they may shrink, bleed, and fade.

Wool and silk are animal fibers. They can be dyed with certain dyes. They also shrink, bleed, and fade.

As they say, knowledge is power. Most of the time there’s a content listed on the bolt. Except when there isn’t, or it comes to you as a scrap. If you know what your fabric will do, you know how best to use it.

The same method I used for burning leaves, works with a burn test. A candle in a tray of water makes it safe. If it gets out of control you just drop it into the water.

Stay safe wherever you are! The snow has to melt sometime.