
Nine dye fastness test cards with various exposures on the threads
1909
1909
1906
1905
1928
1936
1912
1909-1912
1916
September 1929
1907
1912-1913
1909-1916
1912-1914
1915-1925
1912
1937
1942
1912
1905-1915
1938
1938
1938
1938
1909
1930
1930
1956
1912
1909-1910
1918-1923
1916-1917
1910-1917
1914-1916
1906
1908
Feb 1932-July 1934
1912-1913
1913-1914
1912-1914
Oct 1927-Dec 1931
1930-41
1910 onwards