Page 26 - revista

Steps to make these types of drafts:

Put rubber in a laminator the rubber repeatedly passes through large
hot rollers.

Sulfur is added as a curing agent and accelerators for the sulfur to do
its job and a red coloring.

Mix everything from 5 to 10 min until the mixture reaches a
consistency of a thick dough.

Charred vegetable oil is added to the dough (oil with sulfur and calcium
bicarbonate).

When the color and thickness are adequate, the workers remove the
rubber, at this point it is hot and soft due to the laminate. Let it cool

and harden half a day.