Q. Why is the resist on the board
clear, and not green?
A. You have one of our old boards. They work
fine, but they are not as nice as the new boards. If you want you can exchange
the board for a new one from us directly, or just go ahead and use it. If you
use an old board, be aware that your developer should be diluted to 1 - 5, instead
of 1 - 10, and do not brush the resist during the developing stage. Q.
Why is the resist on the side of my board chipped?
A. It is normal
for the resist on one side of the board to be chipped. The resist is applied to
large sheets at the factory, which is then cut into smaller boards. The edge along
the cut is often rough. Q. Do you sell boards thinner than 1/16"?
A. Yes, we have a 1/64" thick board. We also offer a 1/32" paper back phenolic
board. This board very easy to cut for smaller applications, or for classrooms,
and the thin board is perfect for applications where space is a premium.
Q.
Do you sell boards thicker than 1/16"?
A. No, but if you're interested
let us know. If the demand becomes big enough we will come out with them.
Q. What is the thickness of copper on your boards?
A. The
thickness of the copper is one ounce / sq. foot.
Q. How can I cut your boards?
A. Cutting down M.G.Chemicals' presensitized boards can be accomplished in several
ways. Note that Paper Phenolic is easier to cut.
When cutting the boards,
be aware of the following:
- A fine pitch blade should be
utilized; preventing large amounts of material from being removed in quick passes;
causing the resist & its protective film to be torn away and damaged.
- Pressure
exerted on the resist film will cause the resist to be squeezed off the copper
surface therefore care should be taken to avoid this.
Methods of cutting
include:
- A table saw with a fine pitch blade. The blade should be
set just above the height of the presensitized board. The board should be placed
laminate side up.
- A guillotine press is commonly used however the blades
must be extremely sharp and boards should not be stacked.
- Other types of
saws such as band, scroll, jig, etc. may be utilized successfully however they
tend leave undesirably rough edges and cause resist to peel away from the edge
of your cut.
Care should be taken when using any of the above methods of
cutting. Operators of these pieces of equipment should be familiar with all safety
precautions as specified by manufacturer.
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