Use gelatin (Knox's or photo grade, 200 -250 bloom). Put 30 grams in 500 ml distilled water. Allow to swell for 20 minutes. Heat over a double boiler until gelatin has melted. Apply by foam brush, coating blade, or immersion. hang to dry. If double coating, you must harden the intiial coating with formalin or gyloxol.

NWG