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Tinplate does not have the ability to absorb ink, which means that the drying of ink depends entirely on external conditions, such as drying temperature and curing time. If the drying speed is too slow, the printed product is prone to adhesion; if it is too fast, the ink layer may be unstable, affecting the printing quality.

The unique material of tinplate determines that it must be highly compatible with ink to ensure the printing quality and durability of the pattern. The surface of tinplate is usually smooth and has a certain hardness, which makes it impossible for ordinary ink to adhere directly to its surface, and thus puts higher requirements on the performance of ink.

The black spots on the tin plate sheet usually refer to a significant color abnormality that appears on the surface of the tin plate sheet after these processes are completed. These black spots generally appear in the shape of dark or black spots, vary in size, and may be scattered or concentrated.

When handling aerosol tin can, make sure to keep it away from fire sources and high temperature environments to prevent the remaining propellant in the can from expanding due to heat or causing a fire.

In summary, cookie tin cans are not made of 100% tin, but of tinplate. Tinplate combines the anti-corrosion properties of tin and the mechanical strength of iron by coating a layer of tin on the surface of the iron plate, making it an ideal cookie tin can material.