Explain the use of any THREE of the following machines: (i) Spirit Duplication. (ii) Ink Stencil Duplication. (iii) Offset Lithographic Machine. – NABTEB QUESTION

Spirit Duplication: For reproducing master copy that is typed, drawn or prepared from thermographic copiers in several colours by using different coloured carbons.

Ink Stencil Duplication: It can produce up to 500 copies from a master stencil using duplicating ink.

Offset Lithographic Machine: It is used to produce thousand of copies of documents. It produces clear and high quality work such as letter headed papers, form designs, etc.

Photocopying Machine: It is a machine used to produce facsimile or exact copy of documents instantly. It is also used to produce documents in a permanent and legible form.