WER2-O Scattering Titania Paste contains highly dispersed anatase scattering particles (150nm to 250nm). This paste produces a non-active scattering layer when applied onto a pre-printed active layer. This scattering paste is ideally printed in combination with 18NR-T Transparent Titania Paste or 90-T Transparent Titania Paste (Thin Use). After drying, this paste must be fired – together with the pre-printed active layers – at or above 500°C. This results in an opaque sintered layer, with a thickness of ~3μm for one printed layer, when using a 90T mesh screen.