The screen is coated 3 passes each side and allowed to dry. Pour emulsion into the dam to the desired thickness. Let dry thoroughly. Drying can take up to 3 days depending on the amount of emulsion and the screen room atmosphere. A de-humidifier helps tremendously.
Proper exposure is critical.
A 5 kW metal halide exposure lamp is recommended. Lamp distance varies but is generally 40-50 inches from the screen. Exposure time is approximately 1 minute per 100 microns of film thickness. That is approximate and test exposures should be done prior to actual screen production. If fine detail is involved, use the high pressure at the beginning of the wash out phase and then reduce pressure to avoid washing out detail.