The Day&Night, also known as Gradulux, are roll-up with double fabric, which give the option of adjusting the light that enters from the outside without having to leave the gap completely uncovered or covered.
Its operation is the same as in the case of rollers, being able to raise or lower the fabric through a granulated chain, with the difference that in the process of raising or lowering the fabric, it is possible to leave it completely closed or leave stripes where clarity passes.
They are cleaned on, with a duster to remove dust or dirt in relief and in case of stain, it is given on the stain itself with a cloth with soap and water.
You can see some models in the link below.
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