I did this project to get some idea of the relative costs of the materials that were available to carve with. Personally, I was amazed to see that the range of prices was from about $.06 (with shipping included) to over $.50 PER SQUARE INCH!!! In the tables below, it's that 4th column of numbers you want to look at.
The calculation I used was basically...
I present it here in the hope that you find some value in it. Once you find a product you're interested in, you should enter it's name into a good search engine (like www.yahoo.com) to compare sources and current prices.
size" qty/pk $US cents/sq" 4x6 1 1.60 6.66 Safety-Kut block (3/8") 6x12 1 3.75 5.21 Safety-Kut block (3/8") 9x12 1 5.80 5.37 Safety-Kut block (3/8") 12x12 1 6.50 4.51 Safety-Kut block (3/8") 12x18 1 7.50 3.47 Safety-Kut block (3/8") 18x26 1 19.30 4.12 Safety-Kut block (3/8") 26x30 1 29.15 3.73 Safety-Kut block (3/8") 3x4 1 .65 5.41 Softoleum block (1/4") 4x6 1 1.20 5.00 Softoleum block (1/4") 6x12 1 3.10 4.30 Softoleum block (1/4") 9x12 1 4.00 3.70 Softoleum block (1/4") 12x12 1 5.70 3.95 Softoleum block (1/4") 12x18 1 7.55 3.49 Softoleum block (1/4")
size" qty/pk $US cents/sq" 10x4.75 1 5.00 10.52 PZ KUT (1/4") 4x6 1 7.00 29.16 Staedtler Mastercarve (3/4")
size" qty/pk $US cents/sq" 4x6 1 5.49 22.87 Speedball Speedy Stamp (pink, 3/8") 7x11 1 9.99 12.97 Speedball Speedy Cut (cream, 3/8") 4x6 1 3.99 16.62 Speedball Speedy Cut (cream, 3/8") 3x4 1 1.99 16.58 Speedball Speedy Cut (cream, 3/8") 5x7 1 4.49 12.82 Speedball mounted linoleum .9x2.4 1 1.29 59.72 General A1 Eraser .9x2.4 1 .99 45.83 General Factis Eraser 1x2.25 1 .79 35.11 Sanford MagicRub 1954 Eraser 1x2 1 .79 39.50 Sanford Pink Pearl Eraser
size" qty/pk $US cents/sq" 1x2 1 .56 28.00 Pink Pearl Eraser .9x2.4 1 .54 37.50 Mars Plastic (white w/raised markings) .8x2.4 1 .48 25.00 Alvin Erase-clear 1410AE (white) .9x1.6 1 .63 43.75 Factis Black Eraser 6.75x11 1 7.64 10.28 Speedball SpeedyCut (cream, 3/8") 4x6 1 4.24 17.66 Speedball SpeedyStamp (pink, 3/8") 2.5x5 1 3.60 28.80 Staedtler Mastercarve (3/4") 24x36 1 50.92 5.89 unmounted linoleum 8x10 1 7.44 9.30 mounted linoleum
size" qty/pk $US cents/sq" .9x2.4 1 1.09 50.46 ProArt Soft 3088 (white)
size" qty/pk $US cents/sq" 1x2.25 3 2.49 36.88 Sanford MagicRub 1954 Eraser 1x2 3 1.59 26.50 Pink Pearl Eraser (bevel) 1x2 6 2.49 20.75 NoName Eraser (multi-color, bevel)
size" qty/pk $US cents/sq" 1x2.25 3 1.68 24.88 Sanford MagicRub 1954 Eraser .9x2.4 4 2.56 29.62 Mars Plastic (white w/raised markings) .8x2.4 2 .99 25.78 Staples Tech Erasers (white) 1x2 3 1.39 23.16 Staples Pink Wedge Eraser (bevel)
size" qty/pk $US cents/sq" 2.5x5 1 3.29 26.32 Staedtler Mastercarve (3/4") 4x6 1 5.49 22.87 Staedtler Mastercarve (3/4") 9x12 1 19.99 18.51 Staedtler Mastercarve (3/4")
size" qty/pk $US cents/sq" 4x6 1 7.99 33.29 Staedtler Mastercarve (3/4") 6.75x11 1 9.25 12.45 Speedball Speedy-Cut (cream, 3/8")
size" qty/pk $US cents/sq" 4x6 1 1.08 4.50 Soft-Kut (1/4") 6x12 1 2.88 4.00 Soft-Kut (1/4") 9x12 1 4.18 3.87 Soft-Kut (1/4") 12x12 1 5.58 3.88 Soft-Kut (1/4") 12x18 1 6.78 3.14 Soft-Kut (1/4")
size" qty/pk $US cents/sq" 1.5x1.5 27 27.00 44.44 Staedtler Mastercarve class pak (3/4")
size" qty/pk $US cents/sq" 6x6 1 .91 2.53 red rubber sheet (1/16" thick)