Immerse the negative in mythelated alcohol for five minutes, and rub with cotton. If any resin remains, add a little ammonia to the alcohol and place the negative in it, rubbing with the cotton. Rinse twice with alcohol and flow water over the negative. The latter should run evenly.

Another method to remove varnish is to prepare a solution of:

Caustic Potash..............................................

1 oz.

Mythelated Alcohol......................................

10 ozs.

Water............................................................

10 ozs.

Put the negative in a dish, pour on the solution, and gently rock until the varnish is dissolved. Then wash well under the tap.