How do I make stained glass putty?

Answer 1

I have two recipes for glass putty:

1. from Kay O'Neil in Branson, Missouri:

1 quart whiting

1 tablespoon mortar black (carbon black, available from concrete suppliers)

scant 1/4 cup boiled linseed oil

about 1 cup turpentine.

Mix the ingredients, adjusting linseed oil and turpentine to your preferences, and let the mixture set for several hours. It should be viscous but not runny.

2. from Dave Morrison in Seguin, Texas, comes this recipe, which has the added advantage of allowing you to mix and store the dry ingredients and the wet ingredients separately, so that you can mix up only as much putty as you need for the job

Dry ingredients:

2 cups whiting

1 cup plaster of Paris

1/2 cup Portland cement

1/2 to 1 teaspoon mortar black

Wet ingredients (store in a glass jar):

3/4 cup turpentine

1/2 cup linseed oil

To make the putty, mix a scant 1 part liquid to 3 parts dry ingredients. Use more or less as you prefer, but again, you want it to be easy to manipulate without being runny.