1. First, prepare a substrate of appropriate size for proofing.
2. Fix the proofing substrate.
3. Select a suitable type of coating rod and place it on the edge of one end of the proofing substrate.
4. The paint or varnish used for proofing is placed about 1cm below the wire rod. (Please master the dosage by yourself)
5. Hold both ends of the coating rod with both hands, and pull the wet film maker towards the operator at a constant speed and pressure. Please be careful not to turn the wet film maker during the operation.
After proofing, wash the applicator bar in a suitable solvent and dry it with a cloth. Note that the squeegee should always be kept dry.

Rod Brand Recommendations
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| American RDS | Japanese OSP | British RK | Shanghai Modern Environment |
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| Wing machine | Kexin Instrument | Shanghai Jingke | more brands |
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