The numbering is according to the type of colour, saturation and brightness.
On the one hand, the letters represent the colours they are: BV (Blue Violet), V (Violet), RV (Red Violet), R (Red), YR (Yellow Red), Y (Yellow), YG (Yellow Green), G (Green), GB (Green Blue), B (Blue) and E (Earth) the greys C (Cold), T (Toner), N (Neutral) and W (Warm) the fluorescent F (Fluorescent) and finally Extra 100 (Black), 110 (Special Black) and Blender.
In addition to the letter also includes figures, the first digit indicates saturation and the second, brightness. In saturation, 0 is the purest and most intense colour and 9 is the opposite. The second digit is the brightness represented by the scale of 0 the as the palest and 9 the darkest colour.
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https://hartem.com/en-ie/copic-sketch-72-markers-case-e.html55338Copic Sketch 72 Markers Case E<p><span style="font-size: 12px;">Copic Sketch 72 Markers Case E</span></p>
<ul>
<li><b>Copic Sketch </b>are<b> </b>Copic’s most popular markers.</li>
<li>Range of high quality markers, for illustration, manga and professional drawing.</li>
<li>Perfect for colouring images and stamps.</li>
<li>Can be used on paper, cloth, wood, plastic and other surfaces.</li>
<li>They have two tips, bevelled and fine bullet tip for quick sketches.</li>
<li>Colours can be mixed to create shadows and colour gradients.</li>
</ul>
<p>Features:</p>
<ul>
<li>Alcohol-based ink.</li>
<li>Permanent marker.</li>
<li>Fast drying.</li>
<li>Non-toxic, acid free.</li>
<li>Approximate life of 3 years.</li>
<li>Capacity: 1,8 ml each.</li>
</ul>
<p>Presented in a comfortable transparent protective box, it allows you to see the arrangement of all colours and protects them from dust and dirt.</p>
<p>Markers: BG78, BG90, B0000, B66, B69, E0000, E17, E18, E23, E30, E42, E70, E81, E84, E87, E89, C00, W00, YR82, Y0000, Y000, Y18, YG0000, YG61, G0000, G000, G03, G43, G46, BG0000, BG000, BG53, BG57, BG70, BG72, BG75, RV91, RV93, RV95, RV99, R0000, R01, R21, R56, R81, R83, R85, R89, YR0000, YR01, YR12, YR15, YR27, YR30, BV0000, BV01, BV34, V0000, V000, V20, V22, V25, V28, V93, RV0000, RV000, RV00, RV52, RV55, RV63, RV66, RV69</p>
<p><b>How do I recognize colours?</b></p>
<p>The numbering is according to the type of colour, saturation and brightness.</p>
<p>On the one hand, the letters represent the <b>colours</b> they are: BV (Blue Violet), V (Violet), RV (Red Violet), R (Red), YR (Yellow Red), Y (Yellow), YG (Yellow Green), G (Green), GB (Green Blue), B (Blue) and E (Earth) the greys C (Cold), T (Toner), N (Neutral) and W (Warm) the fluorescent F (Fluorescent) and finally Extra 100 (Black), 110 (Special Black) and Blender.</p>
<p>In addition to the letter also includes figures, the first digit indicates <b>saturation</b> and the second, <b>brightness</b>. In saturation, 0 is the purest and most intense colour and 9 is the opposite. The second digit is the brightness represented by the scale of 0 the as the palest and 9 the darkest colour.</p>https://static.hartem.com/media/catalog/product/e/s/estuche_e_de_72_rotuladores_copic_sketch.webp435.76instock512.66354.276421764231576.9000https://static.hartem.com/media/catalog/product/e/s/estuche_e_de_72_rotuladores_copic_sketch.webp/Copic/Rotuladores/Fine Arts/Markers/Alcohol-Based Markers/Fine Arts/Fine Arts/Markers/Fine Arts/Vegan Materials for Fine Arts 1576006530000