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INDICATOR SHEET (MACHINE-TRANSLATION BY GOOGLE TRANSLATE, NOT LEGALLY BINDING)
ES2855823
Indicator sheet applicable to the plastic covers of greenhouses that includes: A transparent or translucent binder polymer. One or more pH-sensitive halochromic pigments of the medium with color change at pH less than 7. For example, mixture of bromothymol blue and methyl yellow. A hygroscopic material. UV radiation absorbing additives. Optionally, one or more buffer substances. Ultraviolet absorbers and halochromic pigments can be added or incorporated into hydrotalcites, layered double hydroxides, or anionic clays. (Machine-translation by Google Translate, not legally binding)
The implementation of integrated agriculture limits the use of pesticides. Elemental sulfur in powder or sublimated form is the only treatment allowed and is therefore the main enemy of greenhouse covers. This indicator sheet is especially applicable in greenhouses, allowing the state of degradation of plastics to be known by controlling the presence of sulfur oxides. The sheet can be adhered or fixed to the plastic greenhouse covers and changes color depending on the level of sulfur and/or chlorine accumulated in the greenhouse cover.