Tampa^® Star TPR.

The ink should be stirred homogeneously before printing and if necessary during production.

Using TPR as a 2-component ink
According to the substrate and the required ink characteristics, it is possible to add hardener to Tampa^®Star TPR before printing: 
10 parts of ink : 1 part of hardener

Pot life
The ink/hardener mixture is chemically reactive and must be processed within the respective pot life (referred to 20 °C and 50 % RH): 12-14 h (H 1), 8-10 h (H 2), 8 h (H 4), 8-10 h (HX). Higher temperatures reduce the pot life. If the mentioned times are exceeded, the ink's adhesion and resistance may be reduced even if the ink still seems processable.

If using HT 1, there is no pot life to consider since this hardener is only activated by a baking process (30 min/150 °C).

Parallel to physical drying (i. e. to the evaporation of the solvents used), the actual hardening of the ink film is caused by the chemical cross-linking reaction between ink and hardener. For Hardeners H 1, H 2, H 4, and HX this reaction can be accelerated by higher temperatures, in the case of HT 1 it is a must.

When using hardener, the processing and curing temperature must not be lower than 15 °C as irreversible damage can occur. Please also avoid high humidity for several hours after printing as the hardener is sensitive to humidity.

Physically very fast drying. Touch-dry at 20 °C after 60 sec, at 30 °C after 15 sec. The addition of hardener will extend the drying time.

The times mentioned vary according to substrate, depth of cliché, drying conditions, and the auxiliaries used.

Clichés 
All commercially available clichés made of ceramic, photopolymer, thin steel, and chemically hardened steel (10 mm) can be used. The recommended cliché depth is 18-21 µm. 

Printing pads 
As per our experience, all common printing pads consisting of materials cross-linked by condensation or addition can be used.

Printing machines
Tampa^®Star TPR is suitable for closed ink cup systems, as well as for open ink wells. Depending on type and usage of the machine, it is to accordingly adjust type and amount of the thinner used.