To make the gel you measure out the appropriate amount of pemulen TR2 powder and mix with an appropriate amount of solvent.

The master recipe for the gel is

100 mL de-I water

10mL  base

1 g. Pemulen

At Shelburne, we have used two alkaline compounds to make up the gel: triethanolamine (TEA) and a solution of 2% TRIS in deionized water.  Making the gel up with TEA using this recipe results in a gel with a pH of about 7.5-8.  When this gel proves to produce an emulsion that is too aggressive for cleaning, the gel recipe is modified replacing some of the TEA with the solution of 2% TRIS.  This often results in a less aggressive emulsion cleaner even though the pH remains at 7.5-8.