First, according to the size of the seal, print the signature with the blackest degree.

Second, cut the signature with scissors.

Third, compare the sulfuric acid paper with the signature size and cut it out.

4. Use the pressure plate provided by the machine to mix and flatten the signature paper, sulfuric acid paper and photosensitive material.

5. Expose on a photoreceptor.

6. Take out the exposed seal, remove the signature paper and sulfuric acid paper, and get the desired signature seal.