CHAPTER IX

PREPARATION OF SHEET RUBBER

Pale (air-dried) sheets--Uniformity of product--Pans _versus_ tanks--The ideal tank--Modern installations--Care of tanks-- Standardised dilution of latex--Variation in dimensions and density of coagulum--Standardising instruments--Method of using--Skimming latex--Style of sheets--Standard sheets-- Rolling and marking--When to work the coagulum--Hand-rolling-- Power smooth-rolling--Marking rolls--Preparation for smoke- curing--Caution against accumulation of wet sheets--Hot-water treatment--Dripping in the open air--When to place in smoke- house 89