Plastic packaging bag proofing is mainly divided into two types because of different proofing methods. One is mechanical proofing and the other is simple proofing, mainly to determine whether the material, printing, and size of the plastic packaging bag are appropriate. This time the editor will introduce to you these two proofing methods.The first is simple proofing. Simple proofing is also called manual sampling, which mainly determines whether the material, size, and thickness of plastic packaging bags are suitable for customers. The advantage is that the general plastic bag manufacturer\u2019s proofing in this way is free, but the disadvantage is that because it is simple and easy to make by hand, there may not be a machine that can do it well in details, such as edge sealing and folding. It is only for determining whether the material, size, and thickness are appropriate, such as the hardness of the material, transparency, etc., and there is no way to see the printing effect.Mechanical proofing. Mechanical proofing, in fact, is to make a small batch of confirmation before making bulk goods, and then start making bulk goods after confirmation. However, this kind of proofing generally requires a fee. If you want to print, you need to make a version in advance. The charge price is generally 200-400 (not including the version fee). Note that the proofing fee is charged separately. This fee. However, in order to increase the advantages, many plastic bag manufacturers will promise to refund the proofing fee and version fee (such as us) when the customer's payment reaches the requirements of the plastic bag manufacturer, but that will happen after that. If the quantity is particularly large, many plastic bag manufacturers can help print and plate-making for free. Note that \u201cbig\u201d here refers to those with a weight of several tons or a payment of tens of thousands of hundreds of thousands.