Bill Yu-Abstraction in Urban Sketching

Workshop

Note: Refunds minus the credit card transaction fee are available up to four weeks before the beginning of the workshop. After that, the student must find a replacement and negotiate payment with the replacement. If you need to cancel, contact us. The team may be able to help find a replacement. Please see the LAA Cancellation and Refund Policy.

Abstraction in Urban Sketching

September 20, 2025 9:00 AM – 3:00 PM
Instructor: Bill Yu

LOUISVILLE ART CENTER
801 Grant Ave, Louisville, CO 80027

Member $55
​Non-member $75


In this workshop, we will explore a number of approaches to bringing color into our urban sketching with a few  different approaches. Using watercolor as our medium (students can choose to use one or all the materials) and some non-traditional tools, we will combine abstract and realist elements into our sketches.

BILL YU
William Yu is a Boulder-based artist who believes that everyone and anyone can enjoy creating art. Working primarily from direct observation of the figure and landscape his mediums include oil paint and cold wax, watercolor,  charcoal, and ink. Some of his influences include Andrew Wyeth,  Alberto Giacometti, Wayne Thiebaud, Egon Schiele, and Paul Klee.

William has participated in Open Studios tours since 2018. His work has been exhibited and sold locally and internationally.

Some of Bill’s work:

BILL’S URBAN SKETCHING MATERIALS:

  • Paints
  • Paint palette/box
  • Brush(es)
  • Sketchbook, sketchpad, or block
  • Water container
  • Pen(s) with waterproof ink
  • Plastic card (expired credit card, gift card, ID card, etc)
  • Pencil
  • Paper towels,napkins, or a natural sponge.
  • Acrylic marker in white (https://www.dickblick.com/items/uni-posca-paint-marker-white-x-fine-tip-07-mm/)
  • Bamboo reed pen

Optional gear

  • Portable chair (camp chair works well)
  • Sun hat
  • Umbrella
  • Portable easel/pochade (tripod, shelf, and support holder)
  • Rubber shaper tool (https://www.dickblick.com/products/kemper-rubber-finishing-tool/)
  • Kakimori steel nib dip pen ($$)
  • Fountain pen with waterproof ink
  • Drafting tape (3M blue or Frogtape)
  • Spray bottle with water
  • Squeegee
  • Wax crayon

Paint

I suggest using tube watercolors, most of mine are from Daniel Smith, Schmincke and Winsor-Newton and are their professional grade quality. Since we will be doing limited palette work you can use as few as a single color but I would suggest no more than six (6) colors using two versions (a warm and a cool) of blue, red, and yellow.

My palette (all Daniel Smith except as noted):

  • Ultramarine Blue
  • Schmincke Cochenillerot Red (Alazarin Crimson)
  • Hansa Yellow Medium
  • Quinacridone Gold (or Yellow Ochre)
  • Cobalt Teal Blue (or Pthalo blue)
  • Cadmium Red Light

I keep my paints in a small tin (like an Altoids tin) which holds half-pans. I fill empty half-pans with my tube paints and let them dry before carrying them into the field. A palette should have an area to mix paint preferably on a white background. Any of the metal field palettes will work too.

You can also use a pre-filled set:

Kuretake Gansai Tambi (https://www.dickblick.com/products/kuretake-gansai-tambi-watercolor-paint-pan-sets/?Item=01664-1129)

Daniel Smith

(https://www.dickblick.com/products/daniel-smith-watercolor-half-pans/?Item=01683-1049)

Brushes

I use travel brushes for urban sketching but full-sized brushes are also good if you can carry them. I suggest using a good quality synthetic watercolor brush in a size 4 or larger if you can only have one. Or just use a waterbrush – I used this as my only brush for over a decade.

My brushes:

Rosemary and Co. R17 Pocket Golden Synthetic Pointed Cat’s Tongue – Size 4 (https://www.rosemaryandco.com/watercolour-brushes/r17-pocket-golden-synthetic-pointed-cats-tongue)
Pentel water-brush – large (https://www.dickblick.com/items/pentel-aquash-water-brush-large/)

Also good:

Princeton Neptune
Princeton Heritage (1/2″ one stroke flat)
Kingart Original Gold (1/2″ Wash flat)

Paper

It’s best to use 100% cotton paper in a pad, block or a sketchbook but any paper that is 90lbs or higher in weight will work though this paper will not allow for multiple washes.  I use both cold-press and hot-press papers. Either will work for this workshop. If you have not tried one then I suggest you try the other but use the one you prefer if you have tried both. Cold-press paper will have more tooth so paint will ‘stick’ more. Hot-press paper is smooth so the paint will slide more and seem to sit atop the paper.

Watercolor blocks or pads

(7″x10″ –  12″x16″) – no bigger unless you have a portable easel:
Any of these manufacturers will work  as long as the paper is 100% cotton.

Arches
Fabriano Artistico
Saunders Waterford
Legion Stonehenge Aqua Watercolor
Winsor & Newton Professional

Watercolor sketchbooks – (at least 4″x6″)

Etchr Studio sketchbook – landscape or square (https://etchrlab.com/collections/sketchbooks)
Hand Book Paper Co. Travelogue Watercolor Journals – 5×25″ x 8.25″ or square
BAOHONG – Watercolor Sketchbook, 100% Cotton, 24 Sheets, 140lbs / 300gsm, 9.4″” x 6.37″” / 24 x 16cm, Hot Pressed, white

Portable easel/tripod:

I use:
Lightweight tripod with an Arcus ball head.
Panel holder from Prolific painter
Tripod flat shelf from Cup Easels

Abstraction in Urban Sketching

Member $55
​Non-member $75

LAA Members: To get the discounted price, use your member code during check-out. The Member Code can be found in your membership confirmation email and any LAA Newsletter.

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