Fencing located at the window the seedlings from direct sunlight or “curtain” of the glass will be without curtains, if you make frosted glass. It does not have to resort to abrasive.
It is enough to apply with a brush on the glass surface a mixture of powder of chalk with liquid glass — silicate glue.
Recommend to read
GENTLE CLAMP
Despite the fact that the clamps clamping the Cup is loosely fitted on the axis and not rotate as you tighten, it can be rotated together with the screw, damaging the surface of the...
HOLDER WITH EYELET
Tighten the screw in a tight place you would help an ordinary wire with a eyelet on the end, bent as shown in the figure.