After the moulds and cores are made, they are taken up for painting which the done as detailed below: -
A1) Green sand moulding:
The mould are spray- painted with graphite based paint which is prepared by mixing ready mix graphite paste / powder in water to the required viscosity so that paints is neither thin nor thick but at the same time the moulds could be painted uniformly.
Once the moulds are painted, they are left over for drying to about 6 to 8 hours (sometimes over night).
B1) CO2 Silicate Moulding: -
Here the paint is prepared by mixing ready mix by paste / paint with thinner (spirit) to the desired viscosity and then spray painted uniformly in the mould which is ignite after painting so that moulds get dried properly.
C1) No-Bake System:
Here the painting of the moulds can either water base or thinner base and paint – either water base or thinner base is prepared in the same way as mentioned above in A1 / B1 depending on the type of painting. The moulds are left for over or ignited for drying.
D1) Red-Sand natural Cay Mould:
Here the painting is done essentially in water base graphite paint prepared in the same as mentioned in A1 but left over for a longer time for drying.