Code 4352 applies to employers engaged in engraving, recording master tapes, video tape duplication as well as other operations listed below.  Engraving contemplates cutting lettering or pattern on to steel or copper strips.  Steel or copper strips are coated with a solution that is resistant to etching acids used in the engraving process.  The strips of steel or copper are then treated with acids which dissolve the metal so that the lettering can be etched into the strips.  The etching is blocked and set into a press which allows the ink to raise from the paper.

Music recording studios are engaged in recording music of others.  Recording artists will pay a fee to the employer for use of the recording studio.  Employees of the employers control all electronic recording apparatus and record the music to make the master recording.  The master tape is edited in accordance to the customer’s specifications.

Video tape duplicating involves the duplicating of master tapes received from customers.  The customer provides the employer with a master video tape and requests for a specific number of copies of the tape to be made.  The employer will duplicate the tape by inserting the original tape into a tape duplicator.  Blank tapes are inserted into the video duplicating machines that transfer the images of the original tape onto the blank tape to produce the copy.  After the specified number of copies are made, the original as well as the copies of the video tape are returned to the employer’s customers.

This classification also includes hand painting of lamp bases, china, and restoration of paintings.