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Compressed Powder Matrix


: From $36.00 to $135.00

Select Product Options to View Available Quantity Discounts

Sheet Size:
The Bakelite Matrix Board that we have supplied and used in our own stamp production for 60+ years has now been discontinued by the last firm still making it.  But, we are happy to announce that we are able to bring back COMPRESSED POWDER MATRIX.  We sold CPM and used it ourselves 20-30 years ago.  It is an outstanding product.

• When heated it becomes soft like a paste allowing for easier and
deeper penetration of magnesium and photopolymer master plates
• .230”-.240” overall thickness with .135” floor to accommodate both
standard (16 gauge) and deep etch (11 point) master plates
• Little to no risk of damage to the master
• Exact reproduction of fine details into the board
• Wide time and temperature range for processing
• Virtually unlimited shelf-life without pre-curing
• Not affected by humidity

Processing Instructions

Because this material melts so completely before hardening, it is essential that you use bearer bars to control platen spacing and alignment. We recommend:

• for 16 gauge magnesium (.064” overall, up to .040” etch) .218” Bearer Bars
• for 11 point magnesium (.153” overall, up to .080” etch) .281“ Bearer Bars

• Spray silicone release solution on the magnesium master. Do not spray the matrix directly.
• Platens should be approx. 310°F. Preheat the matrix and master between the bearer bars on the lower platen for 2-3 minutes with a 1/8” gap from the top platen. Use release paper
on top and bottom to avoid sticking to the platens.
• Slowly apply sufficient pressure so that the platens are tight against the bearer bars.
• Cure for 10-11 minutes.


NOTE:  Orders for full sheets may incur an "oversize" shipping fee by the carrier which may not be reflected in your order total.  We will contact you regarding shipping cost discrepancies.  

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