The Manufacturer and Builder 2, 1878
The cause is darkness. If you expose them often to sunlight they will not turn yellow. When they become yellow you may bleach them by exposure in a room filled with chlorin vapor, or, what may be better and safer, with ozone. The best thing perhaps is not to keep your cottong goods too long in confined dark places, but to ventilate them often, and let sun or at least daylight act on them.
Ei kommentteja :
Lähetä kommentti