Skip to main content

Table 1 Rathgen research laboratory evaluation scheme for micro-fading results

From: Micro fading test for textile single yarns: a new methodology applied to the Reformation Tapestry to assess its sensitivity to light

Classification

Suitability for exposition

Exposure limits

% of total exhibition time

exposure time in a decade

exposure in

lux hours per year

BW1

Very sensitive; not recommended for exhibition

0%

BW2

Sensitive; not recommended for permanent exhibition at 50 lx

20%

2 years of 10 years

30,000 lx h/a

BW3

BW4

Less sensitive; suitable for permanent exhibition at 50 lx

100%

10 years of 10 years

150,000 lx h/a