Thermoform, TF Series
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Thermoform, TF Series

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ThermoForm TF is an extremely flexible ultra violet curable screen printing ink specifically formulated for printing plastics used in vacuum forming. ThermoForm TF exhibits outstanding vacuum forming characteristics and ink elongation while maintaining excellent adhesion and opacity . Additionally, ThermoForm TF provides ideal characteristics for heat bending and routing acrylic sheets with no chipping or loss of adhesion .
PERFORMANCE PROPERTIES;  Extreme elongation for maximized draw depth, exceeding 6 inches Multiple passes can be heat bent and routed without chipping Excellent intercoat adhesion, even when cured multiple times Contains lightfast pigments and is moisture resistant for exterior exposure, High density halftones and backing white for back-lit applications NVP free.
RECOMMENDED SUBSTRATES;  ThermoForm TF was designed to adhere to plastics used for vacuum forming, including , but not limited to: polystyrene, PETG , polycarbonate , high impact styrene, Plexiglas, acrylic and PVC. To determine suitability of the product for the intended use, a pretest prior to production is advised.
CURING SPECIFICATIONS ThermoForm TF will cure well when printed through a 355 plain weave polyester mesh or finer. ThermoForm TF 's optimal cure window of 310 to 350 millijoules is generally achieved with one 300 watt per inch mercury vapor lamp at a belt speed of 30 feet per minute . This should provide a thorough cure of the product including opaque colours. Belt speeds can be increased dramatically as the substrate gauge is reduced . Thick, plastic substrates act as a heat sink and result in slower cure rates. For maximum opacity retention on deep draws coarser screen mesh may be used , increase millijoules output and make sure to test for proper cure and adhesion . Excessive film thickness does not impede vacuum forming properties . Adhesion should be a minimum of 90% from curing unit with final adhesion developing within four hours of initial polymerization. Coarser fabrics can be utilized , however , cure parameters may need to be adjusted for the increased ink film. If a loss of gloss or adhesion due to insufficient cure is noticed, the use of 5-10% TF Mixing Clear will increase light Penetration and improve cure.
PRINTING Mix well prior to every use. Although ThermoForm TF has been supplied in press ready condition for most applications, this system may be reduced up to 10% with TF Thinner for viscosity adjustments .
Use only TF Thinner , any foreign products will render the product useless for vacuum forming . For applications requiring chemical resistance , pretest for required resistance before printing.
SQUEEGEE -A 70-90 Durometer polyurethane blade is recommended.
COVERAGE -ThermoForm TF will yield and average of 2800 to 3200 square feet per gallon based on a film deposit of .40 to .60 mil thickness.
METALLICS -TF Metallic Mixing Clear is supplied for use in mixing metallic powders such as leafing and non-leafing silver and gold. The increase in viscosity of Metallic Mixing Clear helps insure a good powder suspension and maintain a good premix shelf life. The recommended mixing ratios are 8% by weight of silver powder and 20% of gold powder. For optimum coverage and opacity, 280-305 meshes are recommended. With the use of TF Overprint Clear, extended weatherability and non-tarnishing properties can be achieved.
STORAGE -Care should be taken to store ink in tightly closed containers located in a cool (50°F to 77°F), dark place. After long production runs excess ink from the screen should be properly disposed. With suitable conditions, the ink is expected to have a shelf life of approximately 12 months from date of manufacture.
PRECAUTIONS -Read the material safety data sheet prior to processing. It contains instructions for precautions when processing, handling and storing inks, as well as first aid.It is the printer's responsibility to pre-test the ink selected prior to engaging in a production run.
Colour Range
Thermoform TF is available in twenty standard opaque colors and nine Color Matching System shades. Inktech's Color Formulating Guide reproduces over 1,000 colors utilizing the CMS shades. Custom matches, fluorescent, metallic and transparent colors are available upon request.