27 Lithographic Transfer Making
1 Machines used in lithographic transfer making shall not be brushed down but shall be cleaned either:—
(a) with moist materials, such as oily rags, in such a manner as not to disperse any dust into the air, or
(b) with an efficient vacuum cleaning apparatus.
2 All pieces of cotton wool or similar material which have been used in the process of lithographic transfer making shall:—
(a) be kept in a suitable receptacle or receptacles which shall be provided by the occupier for the purpose, and
(b) when no longer required for use, be removed and burnt without unreasonable delay.
3 The cleaning of pads from lithographic transfer machines in which powdered colour is used shall be done with an efficient vacuum cleaning apparatus.