Gum Solution Ceramics

Conforms to astm d 4236.

Gum solution ceramics.

Old thick glazes can be brought back to their original creamy consistency by thinning the glaze with water first then adding about a tablespoon of amaco gum solution or as much as needed to obtain good brushability without drag. Add amaco gum solution to glazes to improve their brushability and slow their drying time which results in a more even and consistent application. Gum solution amaco 16oz. Gum solution will prevent glazes from drying fast and cracking.

These organic additives can however decay in glaze solutions over time unlike the inorganic materials that make up the glazes themselves so keep that in mind when adding them to a glaze. Amaco lab recommends using no more than 1 4 cup of distilled water to each tablespoon of gum solution. By adding gum solution one tablespoon per pint at a time you can slow the drying time of the glaze making it brush easier and diminish cracking and peeling issues continue to add gum solution a little at a time until the problem is resolved. Some like cmc gum magma and spectrum brushing media are organic while others like spectrum suspender bentonite veegum t and bentone ma macaloid are clay like materials.

One half to 1 gum figured as dry gum as a percentage of the dry weight of the glaze is usually considered the upper limits for gums. Gum solution can be used to thin overly thick glazes and bring them back to a brushable consistency and to prevent glazes from cracking as they dry which can lead to crawling on firing. Let it dry then brush on a clear glaze. How much cmc gum powder is in the gum solution you buy.

As it turns out laguna gum solution has 6 7. Acmi certified non toxic. Amaco gum solution. Too much gum can cause a glaze to.

Amaco rsquo s gum solution can be used to bring old thickened glazes back to their original consistency. The solution is to either make your own underglaze having a lower gum content or decorate ware in the dry or leather hard stage so the bisque fire will neutralize the gum. Try adding the gum or glycerin a bit at a time checking occasionally to see how the glaze brushes on a piece of bisque ware. As glazes and underglazes age the binder can break down causing peeling crawling and cracking.

Carboxymethylcellulose cmc gum is used to thicken and stabilize materialsit is a nontoxic food grade additive that is seen in ice cream toothpaste diet pills and even personal lubricants it is used in ceramics to harden unfired ceramic glazes it is also a helpful addition to stain mixes that are applied over glaze by stamping or painting a small amount of gum is added to a quart of warm. The glaze should thin down as you add the syrup.