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Watercolour Mediums

We are big fans of watercolour here at Pegasus Art. We have a wide range of watercolour mediums for you to explore. By using different mediums, you will be able to take control of certain visual and textual effects such as gleam and gloss, adhesiveness, thickness, opacity and more.

From the likes of Van Gogh and William Blake to Turner and David Jones, some of the world's most captivating art has been made using watercolours. Whatever level of artist you are, watercolour offers so much and can be so rewarding to use. There is something about the freshness and lightness of the colour that makes it feel like no other kind of paint. A big part of how you can get the most out of your watercolour paint is the mediums that you use with it.

Watercolour Primers & Ground

By changing the quality of the paper onto which you paint with a layer of medium, you will be able to affect the way in which the paint reacts with it. Certain watercolour ground or primer layers will for example serve to make the paper more receptive to pigment.

Watercolour Masking Fluid

If you want to mask areas for overpainting at a later stage, you will want to make sure that you have some watercolour masking fluid. This medium forms a fast-drying, water-resistant film on watercolour paper or board, and it can be easily removed with an eraser, soft tissue or a cotton ball once it is dry. Once you have removed the patch, you will have a plain white space where you have just painted over the fluid, as it will have stopped your paint from getting through and into the surface of the paper.

Just use an old brush, pen or a cotton ball to apply the masking fluid so that you don't get it on the brushes which you are using for your watercolours, as it can be tricky to remove from brushes.

Watercolour Granulation Spray, Gum Arabic & More

There are lots of different ways in which to alter the watercolour you have, and it all depends on the kind of project you have in mind. Personally, we see this as a great opportunity to experiment. If you have a range of mediums, you can often find sparks of inspiration once you see the effect that the medium has on the paint.

The watercolour mediums avilable here simply need to be added in doses to the paint or mixing water itself to affect its attributes. You can use watercolour granulation sprays to add texture break up the smoothness of the paint while it's wet. Or mediums such as gum arabic to act as a binder and extender which makes your paints more viscous - very handy for creating a gradiant wash. There are even watercolour mediums that give your paint a pearly shimmer, or those that can make your work dry permanently waterproof - so you paint over without lifting the first layer.

Watercolour Ox Gall

Another great watercolour medium to consider experimenting with is watercolour ox gall. This is going to be handy if you want to make your watercolour as fluid as possible, so that it flows very smoothly. Increasing the wetting of your paint in this way will be a simple job with some ox gall. This medium simply needs to be added directly to the mixing water before diluting the paint. A few drops and the characteristics will have changed.

Pebeo Drawing Gum Marker Pen 4mm - Masking Fluid Pen Pebeo Drawing Gum Marker Pen 4mm - Masking Fluid Pen
£5.80
1 in stock
New Magical Masking Fluid Pen from Pebeo original 4mm tip- Art gum is a peelable rubber solution used to protect areas from colour. This is a great new product which allows you to apply precision masking fluid lines.  The pen form is easy to use: shake the pen before taking off the lid, press down a few times on a surface and then draw! Make sure you clic the lid on securely when finished so that…
Aero Metallic Medium for Aero Color Inks Aero Metallic Medium for Aero Color Inks
£13.01
£10.25
Out of stock
Aero Metallic Medium 28ml with pipette Achieve gleaming metallic effects with Aerocolor Acrylic Inks which this highly concentrated medium is mixed together.  Recommended for airbrush techniques for nozzles of at least 0.3mm. Produces lightfast, water-resistant acrylic based surfaces. Shake before use
Aero Textile Medium for Aero Colour Inks Aero Textile Medium for Aero Colour Inks
£10.22
£8.05
1 in stock
Schmincke AERO TEX  textile medium 28ml Schmincke AERO TEX textile medium produces a textile air-brush colour when mixed with 1 part AERO TEX and 1 part AERO COLOR® Professional. Before applying the fabric should be washed dried and ironed. After finishing the design should be left to dry then ironed on the reverse side. Cotton should be ironed for 2 minutes; silk/wool for 4-6 minutes; synthetics…
Daler Rowney Watercolour Art Masking Fluid 75ml Daler Rowney Watercolour Art Masking Fluid 75ml
£8.50
£7.80
Out of stock
Watercolour Masking Fluid 75ml This fluid is used to create striking white highlights or to mask areas for overpainting at a later stage. It forms a fast-drying, water-resistant film on watercolor paper and board, easily removable by rubbing with an eraser, soft tissue, or cotton ball when dry. An old brush, pen or cotton ball should be used to apply Masking Fluid, as it is extremely difficult to…
Daniel Smith Masking Fluid 30ml Daniel Smith Masking Fluid 30ml
£9.56
£8.82
1 in stock
NEW DANIEL SMITH Masking Fluid offers excellent coverage and easy-flowing application. Brush it on or apply straight from the bottle. Off-white when wet, it dries to a transparent caramel color. Left on a painting for a week, a month, or more, it can still be pulled cleanly from all watercolor surfaces. Included with the bottle are five fine-point tips that can be attached to the bottle and used a…
Daniel Smith Transparent Primer 118ml - Watercolours & Acrylics Daniel Smith Transparent Primer 118ml - Watercolours & Acrylics
£10.87
£9.99
2 in stock
Transparent Ground or Primer for Watercolours or Acrylic Paints 118ml, 4 fluid oz Daniel Smith Watercolour Ground acts as a primer on surfaces as diverse as plastic to cloth to tin to stone! Paint watercolours everywhere, the possibilities are endless! Daniel Smith ground can be used on absorbent surfaces: canvas; paper; plaster; hardboard. For non-absorbent surfaces it is best to abrade before ap…
Gum Arabic Solution For Watercolour Painting 75ml Gum Arabic Solution For Watercolour Painting 75ml
£8.50
£7.45
Out of stock
Gum Arabic Solution for watercolour painting 75ml Use this medium to increase the gloss and transparency of water colours. Directions: Add gum arabic solution to water colour in small amounts until the desired level of transparency is achieved.  Gum Arabic solution may be thinned with water.
Ox Gall Solution For Watercolour 75ml Ox Gall Solution For Watercolour 75ml
£8.50
£7.45
Out of stock
Ox Gall Solution for watercolour painting 75ml Use these medium to increase the wetting and flow of watercolours.   Directions:  Add a few drops of ox gall solution to the mixing water before diluting watercolour.
Pebeo Drawing Gum Marker Pen 0.7mm Masking Fluid Pen Pebeo Drawing Gum Marker Pen 0.7mm Masking Fluid Pen
£5.80
1 in stock
New Magical Masking Fluid Pen from Pebeo 0.7 mm tip- Art gum is a peelable rubber solution used to protect areas from colour. This is a great new product which allows you to apply precision masking fluid lines.  The pen form is easy to use: shake the pen before taking off the lid, press down a few times on a surface and then draw! Make sure you clic the lid on securely when finished so that the ma…
Schmincke Aero Color Retarder 125ml For Acrylic Inks & Airbrush Co Schmincke Aero Color Retarder 125ml For Acrylic Inks & Airbrush Co
£18.48
£16.42
Out of stock
Schmincke AeroColor Ink Retarter 125ml Retards the drying time - very useful for airbrush techniques. Suitable for spray guns 0,15mm. AERO RETARDER prolongs the drying time, so that the airbrush colour & acrylic inks AERO COLOR Professional stay longer open. The colourless retarder can be added to the colour in a mixing ratio of max. 1:1. When used with a spray AERO RETARDER reduces the possible r…
Schmincke Aero Medium Thinning Agent 125ml Schmincke Aero Medium Thinning Agent 125ml
£18.48
£14.55
Out of stock
Schmincke Aero Medium 125ml Thinner Medium - Improved adhesive quality of airbrush inks Schmincke AERO MEDIUM thinner improves the adhesive qualities of airbrush colour. This product also increases resistance to water and wiping and can be mixed with airbrush colours as desired.
Schmincke Aqua Fix Watercolour Medium Schmincke Aqua Fix Watercolour Medium
£11.86
£9.35
Out of stock
Aqua Fix, developed by the renowned company Schmincke for their quality watercolour paints, dries and makes watercolours waterproof. Add Schmincke Aqua Fix to your watercolours instead of water for them to dry and become permanently waterproof.  This allows you as the artist to layer another colour on top of the dried layer without any lift off of the first colour. To summerize this fantastic medi…
Schmincke Aqua Granulation Spray 15ml Schmincke Aqua Granulation Spray 15ml
£10.40
£9.10
Out of stock
NEW Schmincke Aqua Granulation Spray for Watercolour Painting 15ml Pump Spray This fun granulation spray from Schmincke will create similar effects to granulated watercolour paint in the colours with a more even smooth flow. Instructions:  Shake well before use Spray the fine atomizer granulation spray onto still wet watercolours. If used on watercolour paints that are already granulated the effec…
Schmincke Aqua Shine Watercolour Medium Schmincke Aqua Shine Watercolour Medium
£11.86
£9.35
Out of stock
Aqua Shine has been developed by the reknowned Schmincke company for use with their quality watercolour paints. This Aqua Shine is an iridescent medium for shimmering and pearl effects. It can be applied pure or mixed with (transparent) watercolours. Too much dilution reduced the pearl effect. Aqua Shine retards drying slightly and stays water-soluble. Shake before use. 60ml Bottle Aqua Shine
Schmincke Gum Arabic Concentrated Liquid Schmincke Gum Arabic Concentrated Liquid
£11.86
£9.35
2 in stock
Schmincke Gum Arabic, concentrated liquid. Viscous flow and binding medium for all gouache and watercolour paints. Gum arabic is used as a binder for watercolour painting because it dissolves easily in water. Pigment of any color is suspended within the acacia gum in varying amounts, resulting in watercolour paint. Water acts as a vehicle or a diluent to thin the watercolor paint and helps to tran…
Schmincke Liquid Frisket Schmincke Liquid Frisket
£6.14
£4.85
1 in stock
Liquid Frisket from Schmincke Without ammonia Frisket solution is used as a mask to protect an area of paper as colour flows around it. Artists can also use liquid frisket for drawings, a right-handed artist will want to draw from left to right in order to avoid smearing the image. Sometimes the artist will want to leave a section of the image blank while filling in the remainder of the picture. A…

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