"Of the three primary colors, the three binary ones are formed. If you add to one of these the primary tone that is its opposite, it cancels it out. This means that you produce the required half-tone. Therefore, adding black is not adding a half-tone, it is soiling the tone whose true half-tone resides in this opposite me have just described. Hence the green shadows found in red. The heads of the two little peasants. The yellow one had purple shadows; the redder and more sanguine one had green ones."

“Paul Signac, excerpts from From Eugéne Delacroix to Neo-Impressionism in pdf”

“Pissarro wants to achieve delicacy by means of adjustments of nearly like tones; he keeps from juxtaposing two distant tones and does without the vibrant note which such contrast gives, but strives on the contrary to diminish the distance between two tints by introducing into each one of them intermediate elements which he calls 'passage'. But the neo-impressionist technique is based precisely on this type of contrast, for which he feels no need, and on the violent purity of tints which hurts his eye. He has kept of divisionism only the technique, the little dot, whose raison d'etre is exactly that it enables the transcription of this contrast and the conservation of this purity. So it is easy to understand why he gave up this means, insufficient as it is by itself.”

“The Pointillist chooses a means of expression by which he applies colour on a canvas in small dots rather than spreading it flat.”

“Frankly, this is my position: I have been painting for two years, and my only models have been your own works; I have been following the wonderful path you broke for us. I have always worked regularly and conscientiously, but without advice or help, for I do not know any impressionist painter who would be able to guide me, living as I am in an environment more or less hostile to what I am doing. And so I fear I may lose my way, and I beg you to let me see you, if only for a short visit. I should be happy to show you five or six studies; perhaps you would tell me what you think of them and give me the advice I need so badly, for the fact is that I have the most horrible doubts, having always worked by myself, without teacher, encouragement, or criticism.”

“93 works of Paul Signac on WikiArt - by date”

“We have never heard Seurat, Cross, Luce, Van de Velde or indeed Van Rysselberghe or Angrand speak of dots. We have never seen them be preoccupied by Pointillism. Read these lines, dictated by Seurat to Jules Christophe, his biographer: 'Art is harmony; harmony is the analogy between opposites and between similar elements of tone, tint and line. By tone I mean light and dark; tint is red and its complementary: green, orange and its complementary: blue, yellow and its complementary: purple.. .The method of expression relies on the optical mixture of tones, tints and their reactions .”