Hi Phil , Hello eveyone:
This is my brushing machine
( in italian we says : "Spazzolatrice" made in Florence by Saturn )
This machine it's also equipped with brushes dug out to facilitate processing (in which I use to make prototypes or produce bags with colored borders for a famous Florentine house ....
For the my opinion, and I can honestly tell you that to speed up the drying time I use a tannery chemical accelerator inside the color and then in the oven to dry.
There are many techniques, and each house has its own.
For me, waiting 20 minutes for each single piece that makes up the bag means wasting a lot of time and not delivering on time. I know, my work is different from yours, also for the times, I don't have to deliver a single bag, usually there are 20 pieces in 4 days and often there are only 3, with a prototype in the middle. With experience I have learned to use time and the best solutions on the market for companies, to help my work and satisfy the customer who commissions me his production or sampling.
First, the ORLIS S transparent clinging base by Kenda Farben, then the Fenice company color with accelerator when I use the electronic edge dyer, because their color is very liquid and with a long drying time, created to make all edge dyeing machines flow and not block , but I can't wait or apply 5 coats of color, 3 at the most because the purchasing department tells me that it costs too much and therefore the bag goes out of budget.
I also use Uniters, for Mockup samples , with higher cost, they have
a good result , and for me it is the best brand , if you want to create a prototype or a customized bag for a customer , or you are in a leather shop like moynat , and if you are alone and have time with the patience of a cloistered friar ! The color has a thick consistency and 3 coats are enough to have a "pleasant" effect, but as I learned, the last important step is cooking, because the color must stabilize and lock in a strong lasting way at the edges and must not slip off "like spaghetti" as happens in certain bags,.
My working life is more complicated because after delivery, a sample of the bags is chosen, analysed, raped, mistreated, and with various trials and tests it is established whether the product I created complies with company standards.
Yeaaaaah ! it's beautiful to be craftsmen! ;)