Sample No. | Basic containing agent | Formaldehyde content (%) | Solids content (%) | Formaldehyde content after 30 days (%) |
J1 | 5% NaOH | 1.57 | 43.3 | 1.63 |
J2 | 10% NaOH | 1.40 | 42.4 | 1.47 |
J3 | HMTA | 1.09 | 41.8 | 1.83 |
J4 | 25% HMTA | 1.34 | 41.8 | 1.40 |
J5 | 50% HMTA | 1.17 | 43.4 | 固化 |