5 Scitex Vision Inks Activities Own R&D teams in Israel and in South Africa - altogether ~15 people Solvent and UV curable ink manufacturing facility in Cape Town, South Africa. Water-based ink manufacturing facility in Israel
6 Applicative IJ Ink Highly reliable - humectants Solution −2-3 cPs Water based Dye based −No water fastness −Fading −Poor abrasion −Poor adhesion Printing media – paper Highly reliable - humectants Solution/dispersion − cPs Water/Solvents based Pigment based −Light fastness −High abrasion resistance Resin −Water fastness (polymeric resin) −Good adhesion Printing media – any substrate −Good wetting = surfactants Industrial environmentOffice environment
7 Types of Ink
8 Color Fading Color Fading Tests
9 Ink Composition (formulation)
10 Origin of pigments Before the Industrial Revolution, the range of color available for art and decorative uses was technically limited.Industrial Revolution Most of the pigments in use were earth and mineral pigments, or pigments of biological origin.mineral Many pigments were known by the location where they were produced. Pigments based on minerals and clays often bore the name of the city or region where they were mined. Raw Sienna and Burnt Sienna came from Sienna, Italy, while Raw Umber and Burnt Umber came from Umbria.Raw SiennaBurnt SiennaSiennaItalyRaw UmberBurnt UmberUmbria Pigments from unusual sources such as botanical materials, animal waste, insects, and mollusks were harvested and traded over long distances.insectsmollusks Some colors were costly or impossible to mix with the range of pigments that were available. Blue and purple came to be associated with royalty because of their expense.Bluepurpleroyalty
11 Lapis lazuli Mineral pigments were also traded over long distances. The only way to achieve a deep rich blue was by using a semi-precious stone – Lapis lazuli
12 Pigment in Matrix Pigment concentrate in Matrix Stabilizer Magenta Ink Mill Particle size Optical Density Stability Viscosity Filterability parameters The Process
13 Ink manufacturing 1. Crude premix using dispermat (pigment, diluent, dispersant and possibly resin) 2. Mill base using bead mills 3. Assembly of ink
14 Ink manufacturing: Acquiring self-capability to mill base Together with associate-contractor a strategic decision to invest in milling capabilities: Ciba, Clariant, etc- The dependency on a limited number of pre-dispersed pigment suppliers was problematic. Having to deal with these companies prevented price-quality-creativity competition. Often change in their processes was without informing. Source from a wider supply base Controls the complete process from start to finish ensuring product quality, consistency and production efficiency. Superior particle size, Substantially reduced unit cost, Wider pigment choice, Full control over formulation, Simplified down stream processing & Competitive advantage
16 SubstrateLiquid inkSubstrateSolid ink Dryer Solvent/ water Solvent or water-based ink UV-curable ink UV light source SubstrateLiquid inkSubstrateSolid ink Unique Features of UV-based Ink: Drying, P.I.S-lamp, Film Thickness, Environmental
17 System Structure
18 Pigments Characterization Weather Stability Weather resistant pigments are usually lightfast but the reverse is not always the case. The selection of pigments for outdoor use depends on : Outdoor performance required (life time, climatic region/ Kilo Langley) Binder type Concentration of the pigment Presence of titanium dioxide (which typically accelerates fading) Concentration and type of light stabilizers used. Performance can also be influenced by the surface of the painted object and by the processing heat history.
19 Pigments Characterization Weather Stability (cont.) Accelerated testing; In addition to a xenon lamp, include wet cycles Interspersed between longer dry cycles. Weatherability is designated in Terms of the 1-5 Grey Scale. 5 represents no change and 1 a severe change.
20 Fields of knowledge 4. QAQC Establishing “ink approval procedures” Establishing methods – e.g, how to evaluate size? Accelerated test for stability prediction Equipment- ST, Rheometry viscometer, filtrations Draw down characterization – OD, gloss, curing..