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K-Label

493K

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How to read K-LABEL K-LABEL Basic displays three separate squares of thermographic ink that which will permanently change colour when they reach a specific temperature. Using K-LABEL Basic for normal roto-grades of polyethylene, correct cure will be indicated when the bottom two squares have turned from white to black. This indicates that a peak internal mould air temperature of 204℃ has been reached. If no squares, or only one square, of ink has changed colour, the part will probably be under-cured. If all three squares have changed colour, the part will probably be over-cured. K-LABEL Advanc

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The part other shops don't tell you. Three separate questions, kept separate on purpose, each with its source.