6.1.1 Fit the exposure cards or specimens into specimen holders and then into the testing apparatus, with all other specimen holders containing either white cards that are half-covered by an opaque cover with cutout, or exposure cards.6.1.2 Carry out exposure under sets of conditions 1,3 and 5 in the non-turning mode,and that under set no.2 in the turning mode. Interrupt exposure only for inspection purposes, in which case remove the specimen holder concerned from the apparatus.