Sample No.

F/U

Formaldehyde content (%)

Solids content (%)

Formaldehyde content after 30 days (%)

T1

2.0

10.52

46.0

2.83

T2

1.8

4.91

45.8

1.52

T3

1.6

3.32

44.0

0.45

T4

1.4

2.94

39.3

0.33