10-2 10-GUIDELINES FOR USING VOC-FREE COLORANTS
COROB™ TATOCOLOR
Refresh the humidifying solution on a daily basis.
10.3 Used dispenser by solvent-free colorants
Filling in a used dispenser by solvent-free colorants needs special attention paid in following
cases:
The dispenser is currently filled with other VOC-free colorants.
The dispenser has been used very little and has dried colorant in canisters.
In these cases the dispenser should be properly cleaned before filling it with VOC-free colorants.
The following steps are recommended:
1. Empty the canisters completely by dispensing all colorant. If you have dried or almost dried
colorants it may be difficult to empty the canister by using the pump. In these cases following
additions can be suggested:
– Add hot water
– Stir manually
2. Use a brush and hot water to clean the interior of the machine (paddles, sides of canisters,
lids, top panels, etc.) thoroughly from solid colorant.
3. Clean the circuit with approximately 2 litres of hot tap water.
4. Clean all exterior surfaces and components of the machine exposed to colorant, including
dispense pipes, autocap assembly, shelf, canister covers, canister lids, etc.
5. Fill the canisters with colorant and dispense approximately 200 ml.
10.4 What to do in case of a microbial contamination?
Due to the absence of solvents and the limitations for usage of biocides, VOC-free colorants
provide a more convenient environment for microbes than traditional glycol-based colorants. By
following the above-mentioned recommendations, the risk of contamination is limited.
It is however always possible that a solvent-free colorant is contaminated in the dispenser. A
contamination is generally characterised by a strong unpleasant odour coming out of the canister
and/or the presence of mould.
Should that occur then take the following action:
1. Remove the contaminated colorant from the canister.
2. Contact the colorant supplier for further actions regarding the colorant.
3. Empty the canister with contaminated colorant completely by dispensing all colorant.
4. Use a brush and hot water to clean the interior of the machine (paddles, sides of canisters,
lids, top panels, etc.) thoroughly from solid colorant.
5. Clean the circuit with hot tap water until the water is no longer coloured.
6. Clean all exterior surfaces and components of the machine exposed to colorant, including
dispense pipes, autocap assembly, shelf, canister covers, canister lids, etc.
7. Pour 2-3 litres of biocide solution into the canister (as regards the more suitable biocide
solution composition contact your colorant supplier).
8. Re-circulate the solution and let it sit in the circuit and canister for about 1 hour.
9. Dispense out all biocide solution.
10. Fill the canister with fresh colorant and dispense approximately 200 ml.
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