Once you have applied some colour to your paper that is not the end of it.Apart from layering colour on top to get greater strength of colour and deeper contrasts, we can develop the actual pigment where it lies on the paper surface and move it around.The pencil core is, after all, a mixture of colour and wax, and wax can be a very mobile material.Associated with this Topic are the two accompanying ones - Working the Surface and Blending & Burnishing
NEED FOR CAUTION !I am repeating here a similar warning to that attached at the top of the section on Fixatives.The only liquid that Coloured Pencils are designed for, is, in the case of aquarelle pencils, Water Very Few liquids in the Art world are manufactured specifically for Coloured Pencil use. This is notably so in the area of fixatives and solvents. There is one reasonably safe liquid I am aware of, made for dissolving wax pencil, and that is ‘Zest it pencil and parchment blend’.If you wish to add anything else in liquid form to your artwork either as a brushed on or sprayed on material, first check the manufacturer’s instructions. If it does not specifically say that the product is made for coloured pencil use, then it probably isn’t. That doesn’t mean that the product cannot be used. Simply that before use, you need to test the liquid thoroughly on a similar surface which carries similar media to the one you wish to treat. Do not risk your carefully worked artwork to experiments. The treated area may not be archival, the treatment may result in colours fading. It is all a bag of worms.HISTORY tells us we get nowhere without experimentation, and the use of most art solvents for coloured pencil is generally a safe area. Do be cautious, though, in treating any soluble pencil media with liquids other than water.The notes below are offered without any guarantees of effectiveness. They should simply guide your own research.
There are a number of options for dissolving and moving the pigment about on the paper - quite apart from the obvious option of water with watercolour pencils.Firstly I will briefly discuss the Icarus Board. Manufactured in the USA and sold by developer, Ester Roi.I have not tried this heated drawing board, but I have seen excellent results from those who have used it. It melts the wax pencil pigment with a controlled heat and full details and a demonstration can be seen on the website. The boards are despatched worldwide. Discounts are sometimes available to members of coloured pencil groups such as CPAL facebook group. The board is expensive - the smallest size is 14 inches x 20 inches working area and is priced around $270 plus shipping and Insurance.A much more basic - and inexpensive - approach to blending coloured pencil pigment is to use a solventThere are many ways to dissolve and blend a wax or oil based colour on the paper, but many of them will tend to leave an oily residue ring around the image area treated, and this may take some time to clear ( if at all).Treat all solvents with great care and test out the effectiveness and the likely results in good time, before attacking your masterpiece with solutions that may cause permanent damageThere are usable solvents designed for art and pencil use, include the familiar ‘Zest-It’ which is a non toxic, non inflammable and a fully biodegradable solvent .The chemical classification of the original ‘Citrus’ product is Orange Terpene - substance number CAS:8028-48-6This is a solvent which was sourced from citrus material ( often the rinds of oranges used for fruit juice production ) and not only acts to dissolve the waxes in Coloured Pencils, but also acts as a de-greaser and glue remover.Some users had commented that they didn’t like to citrus smell, and I see a newer version of Zest-It is now available through art supply sources such as Jacksons Art Supplies , Ken Bromley, and also direct from the manufacturers in the UK. The new version is without the citrus smell and is described as ‘Citrus Free’. I understand the original version is still available.It is probably the safest solvent on general sale and can be purchased over the Internet from the UK suppliers such as the Internet retailers above and shipped overseas without problems. It is non-flammable ( and many solvents are highly inflammable), it is environmentally friendly, and what is most useful, it leaves no residue on the paper.Similar solutionsAugust 2015 I have at last been able to locate a seller of Spectrum Noir products who not only sells their craft lines, but also sells their PENCIL BLENDING SOLUTION. This solvent was suggested to me by a reader in Finland who also critiqued the Spectrum Noir pencils ( which were not recommended by her ). The solvent is very expensive at £6 for a small 75ml bottle. It has no smell at all and it does prove to be effective on the two brands of pencils I tried it on, Polychromos (Oil based) and Coloursoft (wax based).A scan on the results is shown here below, together with tests on the same paper, with the same brands, and utilising a third cheaper but similar solvent This test was carried out on a rough surfaced 500gsm Bockingford watercolour paper, so there were plenty of white flecks visible before treatment. The paper dried quickly and there was no residual stainThe test was on three products. Zest-It Pencil Blend, Spectrum Noir, and a further solvent easily available in the UK De-solv-it ‘sticky stuff remover’. There seems to be little difference in the effectiveness of the three solventsZest it is on sale at Jacksons Art at £7.50 for 250ml. Spectrum Noir is £6 for 75ml, and the De-Solv-it solvent was £1.99 for 250ml at a local discount supermarket - three times the quantity of the Spectrum Noir solution for a fraction of the price.The results of the tests are shown below.
Odourless mineral thinners such as those sold for oil painting will also work but may leave more of a permanent oily mark on a paper surface. If you are using a mineral based spirit ( Odourless Mineral Spirit is sometimes referred to as ‘OMS’) then be cautious about the amount you use. This liquid can soak into the paper surface and stain it, leaving a ring of dark around the edge of the area treated. For this reason the recommended technique is to use a paper stump to take a small amount of the liquid from a safe container that can then be used to manage the pencil pigment oin the paper without wetting the paper surfaceSome of these liquids are also labelled as ‘Toxic’ in the USA and are inflammableIn the USA and also sometimes available in Europe, the solvent ‘Gamsol’ can be used. This is a mineral based odourless solvent from a petroleum base that has a higher flash point than turpentine and is also generally sold as an oil painting thinner. This product is advised as being safer than white spirit. It certainly has no smell and is available from several suppliers in the UK and Europe.The Spectrum Noir blending solution quoted above is manufactured by the Gamsol company ( Gamblin ) and my guess is that it is identical. For more information on the SN product see the appropriate page in this websiteTurpentine Substitute - also sold as Turpenoid - is another option.Possibly a safer option to using thinners or solvents from a bottle is to use a pre-packed solvent in a fibre tipped ‘pen’. These are sold by a number of art product firms such as Tombow, the Finesse blender pen, and Sanford’s own brand Prismacolor blender marker.This can be a dearer way of using solvent as the amount of liquid in a pen is small, but the gentle application will probably be of benefit. The solvent is often alcohol based and they do work.If you are using any of these solvent options, be sure to test out a sample of the solvent on a similar paper and the chosen pencil brand colours. Some solvents have been known to change the colour balance of the pigments.After treatment you may find that the solvent has bedded the pigment into the paper with a lot of the wax/oil carrier and the resultant picture surface may be matte where the treatment has taken place. This may stand out against the more polished surface of the rest of the picture.It is possible to work the solvent into part of your picture to soften the pencil colours, and then blend them using a wax type burnisher such as the fairly hard Derwent burnisher, the Faber Castell burnisher, or the softer wax based Lyra Splender Blender and the Caran d’Ache Full Blender Bright blending stickBaby oil has featured in the past in articles about solvents for Wax pencils. I agree that it works … but it is inclined to leave a permanent oily mark on the paper. Not something I would either want or recommendThere may well be other solvents suitable for CP use and sold throughout the world, let me know of any not listed and give details of known benefits and problems if you can.REMEMBER - all solvents need to be handled with careThey may be inflammable and have a high flash point. They may also damage your health if breathed in - so a well ventilated work space is a mustTo Summarise the safety code Bear in mind the need to ALWAYS work in a well ventilated area if you are using any solvent.Use small volumes of liquid until you have assessed the effect of what you are using.Store any solvents you are keeping in a cool placeDispose of any fabric that is soaked in the liquid carefully - bear in mind there will be cautionary notes on any container that will need reading and understanding. Some flammable solvents left on material and shut in a container may build up an explosive ability.Keep solvents off your skinIf you use limited amounts of solvent on a felt pad, don’t dip the pad in solvent, control the amount of liquid by transferring liquid to the pad with a brush.Avoid wetting the support too much unless you are sure the solvent will not stain it.Solvent can take quite a long time to dry off the picture surfaceA link to a useful article on using solvent is on the ZestIt web site - http://www.zest-it.com/zest-it-pencil-blend.htm