Fluka's p.a. melamine, 126 g, was dissolved in 90 g aq. 36% CH2O (brought to pH 8.2 with aq. 10% NaOH and heated to 60degreesC), the mixture was heated 0.25 h at 75degreesC and 13.8 g bi-(Rokopol 7P or D750) or tri-functional polyether polyol (TG-500 or G-1000) (brought to pH 5 with aq. 75% H3PO4), was added; the mixture heated 0.5 h at 75degreesC and allowed to cool, separated in 2 h into the aqueous and the resin layers. The latter was dehydrated (at 1.33 kPa, 60-65degreesC, 1 h) and examined for pycnometric density, Ford cup No. 4 viscosity, dry matter content, hydroxymethyl groups, free formaldehyde, and gelling time (Table 2). Varnish coating (60 mum thick) applied to resin-made plates were cured 1.5 h at 110degreesC and examined for hardness (Persozpendulum), adhesion strength, flexibility, and impact resistance (Table 3). Each resin was chemically resistant to diluted acids and bases (7-day exposure, Table 4). The coatings prepared on the D75-or 7P-modffied resins had satisfactory elasticity (8 mm), impact resistance (35 cm) and relative hardness (0.45-0.47), and were generally superior to those on the G-1000 or TG500-moditled resins. Resin and coating properties were related to modifier type.