Most hotel brands specify that window treatments require blackout capabilities. This creates privacy as well as eliminates light leakage into rooms.
Pinholes are common in drapery fabrics as well as roller shades. However, inherent pinholes do not increase in size without physical or material damage. Typically pinholes cannot be seen unless a bright light is shone through the curtain.
What is the Industry Standard? If you have less than a handful of pinholes on a drapery or roller shade panel that are visible from 5-10 feet away, this is not considered a problem.
Pinholes are inherent to coated fabrics and can occur at random. However, having multiple pinholes throughout seam lines or linearly across the treatment are not common or should be considered acceptable.
Pinholes can be fixed by patching the area with a small amount of acrylic foam. Large areas of light or an abundance of holes will need to be remade entirely.