Permanent Green Light

PW6—Synthetic mineral - titanium dioxide, first produced as a pigment in the early 20th century. Titanium white arrived too late for the Old Masters, who worked in lead. It became the dominant white from the mid-20th century - think of the crisp, opaque highlights in Lucian Freud’s flesh, or the brilliant whites of modern abstraction. The modern painter’s workhorse - the brightest, most opaque white available, and non-toxic. It overtook lead white through the 20th century and now anchors nearly every palette, prized for covering power and clean tints.

PW4—Synthetic mineral - zinc oxide, introduced as a painter’s white c.1780. A late arrival, zinc white was taken up by the Impressionists for clean, non-toxic tints and by 19th-century watercolourists; Turner was among the early adopters. Valued for transparency, slow drying and a lack of yellowing - the white of choice for pale tints and delicate glazes.

PG36—Phthalocyanine Green (Yellow Shade). Synthetic organic. A yellower phthalo green; very strong and permanent.

PY3—Synthetic organic - introduced 1910. A 20th-century pigment - hansa yellow gave modern painters a non-toxic, transparent alternative to the lead and chrome yellows of the past. A bright, transparent, non-toxic yellow - valued for clean tints and glazes where cadmium’s opacity is unwanted.