The selenium drum is a cylinder made of metal with light-sensitive material selenium on it. It is a component in the copier or laser printer, and it is used to print the parts to be printed[Detailed]
Adding powder to original consumables depends on what consumables are.Some brands allow adding powder, and the powder box is designed with a powder adding mouth.But most brands don't allow users to do it themselves[Detailed]
All the original and genuine consumables have passed the quality, emission and electrical performance tests of the national inspection agency before they are launched, and only those qualified can be admitted[Detailed]
If the black silicon drum is not found and replaced in time after use, the other three color silicon drums will automatically modulate black and continue to operate, which is very hateful.
Summary:
HP consumables are too expensive. They are still used by government agencies. I don't think they can afford them.