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TRIMMING:
After lamination, cards or photographs are trimmed using an ordinary 10" or 12" (25 or 30cm) straight-edge photograph
trimming board, leaving a border of approximately 1/8" (3.2cm) of clear plastic around the laminated piece.
If it is desired to round the corners of the finished laminations, this can be done by using a photograph corner rounder.
Trimming boards and corner rounders can usually be purchased through photographic supply houses.
NOTES AND SUGGESTIONS:
The following notes and suggestions are given as a guide toward successful laminating. They are the result of past study
and observations. Although they are based on the use of vinyl or acetate as a laminating medium, they should also be
considered when using other plastic material. Often the best results come after a number of trial runs.
The CARVER Laminating Press is adjustable for use with any of the thermoplastic materials used
1.
laminating. Figures given on the preceding pages for temperature, pressure and time are based on the use of
regular plastic sheets, either .010" or .015" (.25 or .38mm) thick.
When using vinylite plastic .010" (.25mm) thick the thermostats should be set to maintain a temperature of
approximately 320 F. (160°C). The recommended pressure for vinylite is 350lbs.per sq. inch (21.4 bar) of
plastic sheet. Time required to process a stack of laminations containing six layers will be from 16 to 18
minutes heating time depending on thickness of the vinylite used.
Temperature and pressure requirements may vary slightly due to local atmospheric conditions, therefore,
figures given are for average conditions. You may find that a slight variance in these figures may be needed to
suit particular conditions and requirements.
2.
The pressure may drop as much as several hundred pounds (newtons) below the desired load without harm.
This is partly due to the softening of the plastic as it heats and compression of the blotters.
3.
Always have the plastic material cut to the same size as the polished plates. Plastic sheets smaller
polished plates tend to spoil the flatness of the plates as well as cause uneven pressures on
Having plastic and polished plates of the same size also affords easy registering of the layers in a stack of
laminations.
4.
Store your supply of plastic material in accordance with manufacturers recommendations.
room or enclosure having a high relative humidity (approx. 50 or 60%). It is suggested that the thickness of the
cards or photographs be kept to a minimum and that it never exceed 25% of the thickness of the plastic used for
each layer that is, if two sheets of .015" (.38mm) plastic are used the card or photograph should not exceed
.0075" (.19mm) in thickness.
5.
If two laminations are done in the same layer, they should be of the same thickness.
6.
Don't use too heavy a clamping pressure when transferring the stacks from the heating to the cooling chamber.
Use just enough pressure to hold the stack together.
7.
Use the same number of layers per stack each time. If fewer than six layers are used, the time factor should
be reduced proportionately. The general rule is to allow approximately one more minute than the number of
layers being processed.
8.
If one layer of the stack contains a pair of wallet-sized cards it is not advisable to put a long, narrow card or
photograph in adjacent layer. Due to the tremendous pressure involved there is the danger of splitting or
wrinkly the long card or photograph.
4-11
for
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laminations.
Preferably in a
Carver Inc
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