18.104.22.168.2.2 Dip and Pour.
When dry powder developer is applied by the dip and pour method, the process SHALL be observed and checked
periodically to verify the following:
a. Developer dwell area is clean and has adequate room for the parts being processed.
b. Entire part surface is covered.
c. Excess developer powder is removed without brushing or rubbing.
22.214.171.124.2.3 Fog Chamber.
When dry powder developer is applied by a fog chamber, the process SHALL be observed and checked periodically to
verify the following:
a. Work and dwell areas are adequate with controls accessible for adjustment.
b. The system has an adequate reservoir with positive feed and there is no caking or uncovered pressure
c. A good fog cloud is produced with controlled air pressure.
d. Chamber or tank does not create excessive air pollution.
Water Suspended Developer.
When water suspended developer is applied, the process SHALL be observed and checked (paragraph 126.96.36.199) to verify
a. Performance comparison tests are performed on schedule and documented (see paragraph 188.8.131.52.
b. Concentration checks are correctly performed on schedule and documented.
c. Solution is clean with no penetrant on the surface (see paragraph 184.108.40.206.2).
d. Agitation produces a uniform suspension with no caking on the bottom or in the corners of the tank (see
e. Entire part is covered, with no water breaks or air pockets.
f. Part is drained over the tank or recovery tray to reduce drag-out losses.
g. Complex parts are rotated during drain to reduce pooling.
h. After drying, the developer coating is light and even, with no retracted areas of beading or non-wetting
i. Developer dwell time starts when the part is free of moisture.
Water Soluble Developer
When water soluble developer is applied, the process SHALL be observed and checked (see paragraph 220.127.116.11) to verify
a. Performance comparison tests are performed on schedule and recorded (see paragraph 18.104.22.168).
b. Concentration checks should be properly performed on schedule and recorded (see paragraph 22.214.171.124.1).