FLEXO MARKET NEWS FEBRUARY 24th EDITION - page 4

4
February 24, 2014
Flexo Market News
in warm water, apply the soft scrub solution to the
Scotch-Brite surface. Using small circular rotations apply
the cleaning solution to the glass surface and clean the
whole surface of the glass. Rinse the sponge in separate,
warm water bucket to prevent a redeposit of polymer on
glass. If the glass is really dirty you may need to repeat
cleaning the whole surface again.
5.After cleaning, take a lint-free towel and wipe down the
glass surface removing the residue cleaning solution. Once
rinsed, repeat cleaning the glass with glass cleaner using a
lint free towel. Finally, use some alcohol soaked into the
lint-free towel and repeat cleaning the glass surface.
6. Once the glass dries it should have a matte look to it
again. If not repeat steps #1-5 again.
7.When cleaning the lower glass the process is the same
except the vacuum lines are covered with masking tape to
prevent liquids from getting into the vacuum system.
8. If this fails to achieve a clean upper and lower glass,
contact your local Anderson and Vreeland Technical Ser-
vice Representative for assistance. A&V’s trained person-
nel can perform an additional procedure referred to as
“lapping”.This is done with a special tool that cleans the
crevasses of the glass where resin may be trapped and not
accessible without the specially designed glass tool and
cleaning compounds.
Safety
: Please read and follow the safety recommenda-
tions for the products listed under “materials needed” be-
fore proceeding to clean the glasses. Consult the MSDS
sheet regarding these products.
Tip 9
Exposure Unit Glass Cleaning Process
The upper and lower frame glasses have a matte finish
to ensure a proper seal of the cover film to the lower
glass and contact seal of the substrate to the upper glass.
Over time, the matte finish can become contaminated
with dust, cleaning agents, tack rag residue, and even
resin.These contaminates will fill-in the matte finish caus-
ing the glass to turn clear. Once the matte finish is gone,
air will be prevented from escaping. This may result in a
poor lower vacuum seal between the cover film and the
negative being used. It may also result in a poor upper
vacuum seal.When this occurs plates may have dime size
low spots, or a Zebra pattern can also occur. To correct
these problems the upper and lower glasses need to be
thoroughly cleaned. The following procedure is recom-
mended for cleaning both glasses:
Materials Needed
: Lint-free towels, soft scrub solution
or powder, sponge with Scotch-Brite on one side, protec-
tive gloves, safety glasses, two buckets of clean warm
water, glass cleaner, and alcohol.
Cleaning Proces
s:
1. Open the upper frame on the machine.
2.Turn the unit off at the main power supply.
3. Cover the lower frame area to prevent spills and easy
clean up.
4. While wearing gloves and safety glasses, spray the
glass with the glass cleaner. Next using the sponge soaked
Tech
Tip
Lamp Output on Different Types of Exposure Units
#
10
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Tech Tip
1,2,3 5,6,7,8,9,10,11,12,13,14,...16
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