Table 1.

List of all the materials used

Materials	Manufacturer and batch/lot number
Nanohybrid composite resin (Beautifil II) – A2 shade (BISGMA, TEGDMA, aluminofluoro-borosilicate glass, aluminum oxide and camphoroquinone. The average filler particle size is 0.8 mm with a range of particle sizes from 0.01 to 4.0 mm. The filler content is 83% by weight and 69% by volume)	Shofu, USA Lot number: 041823
Tea- Brooke Bond Red Label	Hindustan Unilever Ltd., Mumbai, India Batch number: STP 011019
Coffee – Nescafe Classic	Nescafe, India Lot number: 63430452CA
Coca cola - regular	The Coca-Cola, India Batch number: 090307
Artificial saliva- wet mouth	ICPA Health Product Ltd. Gujarat, India Batch number: C30101
Distilled water	Das Enterprise

BISGMA: Bisphenol A glycol dimethacrylate; TEGDMA: Triethylenglycol dimethacrylate