C-18.1, r. 3 - Technical Standards Regulation

Section 1 Disposition versions

2012-09-01

1. The brightness of the screen for exhibiting a film to the public must meet the following standards:

(1)  brightness at the centre of the screen must be at least 55 ± 7 cd/m² (16 2 La. ft), with the projection window free from interference;

(2)  brightness measurements must be taken at horizontal right angles to the screen, at the centre and each side, from a distance of 5% of the total width of the screen, with that reflected at each side of the screen not less than 35 cd/m2 (10 La. ft);

(3)  from one projector to another, screen brightness may not vary by more than 14 cd/m2 (4 La. ft);

(4)  the amount of scattered light may not be more than 0.5% of brightness at the centre of the screen.

O.C. 1900-87, s. 1.