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3 Pieces Eraser Erasing Shield Template Metal Stainless Steel Drawing Shield Drafting Tool

£4.85£9.70Clearance
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Phthalates are a chemical additive that makes plastic pliable (like a squeeze bottle) instead of hard (like the keys on your keyboard). There is more and more evidence that this chemical group affects the human body in negative ways as phthalates interrupt the hormonal system. Many brands of erasers have stopped using them. These plasticisers are in many plastics we use every day, I think they are of particular concern in rubbers because rubbers crumble and this must help expose more of the chemical to the air and skin. Kneadable putty erasers work by absorbing colour, they do not wear away. They can be very soft or quite stiff, but are not abrasive. Lay out all the drafting tools that you use and separate them into piles of like items. Place all pencils together, markers, erasers, rulers, stencils, paper and miscellaneous. Using the cleaner, spray the cloth and wipe down supplies that have residue on them. The makes of putty rubber vary a lot in softness- from very soft and melty to super stiff almost like a hard rubber eraser.

After thinking about the following questions I set out to see if testing would help me sort out the differences between erasers. A clean sharp-edged vinyl or rubber eraser which can be re-cut periodically to form a fresh clean edge, is handy when sharp thin lines need to be lifted out. Plastic erasers seem cleaner than rubber erasers because their crumbs are not as fine, the rubber eraser crumbs are so fine it is a bit harder to get rid of them all.Specialty – fibreglass pen, cleaning cushion with eraser dust for cleaning up a whole sheet of dirty paper, erasing knife or razor blade and more a. Rubber erasers (they used to be made of natural rubber and now some are synthetic rubber)- middle in the scale of firmness. A few contain abrasives like pumice – but those are usually just the rhomboid-shaped school erasers. The abrasives are designed to erase biro ink. Rubber erasers feel a bit powdery to the touch and this bothers some people a great deal. It’s not always easy to tell some synthetic rubber erasers from plastic erasers if they don’t say anywhere, in that case, I go by the powdery feel. Using a craft knife you can cut a rubber into the size or shape you require for your drawing. Some artists prefer a sharp edge to their eraser. The holes in the erasing shield are where the erasing is done. The metallic parts are to protect what you don’t want to erase. Position the holes over the lines to be erased – hold the shield firm and flat. What’s the difference between flexible and flimsy eraser shield?

How it performed: Fine on light graphite lines and worst on coloured pencil. Fine on removing the graphite under pigment liner pens and didn’t lighten the ink. It didn’t remove too much watercolour paint but didn’t erase the graphite at all so was bad at that task. Harder pencils can make grooves in the paper which cannot be erased.- It turns out that the hardness makes it hard to erase even when lightly applied. Faber Castell Latex Free Eraser, Cream and Grey, natural rubber (two sides: one for graphite and colour pencils and the other for ink.) The more easily a graphite mark will smudge – the more easily it will erase. So no matter how lightly you draw with a hard pencil (6H) it will be harder to erase than a soft pencil (HB or 2B). From now on I will use a lightly applied softer pencil for any sketching that I wish to erase after watercolour or ink have been added.

A ruler is one of the most important pieces of drawing equipment. An opaque-type rulers should only to used to measure distances with lines being drawn with T-Squares and Set Squares. But it must be remembered that the edge of a ruler is not guaranteed to have a perfectly straight edge unlike a good T-Square or Set Square. Rulers used in technical drawing are usually made of polystyrene. Rulers come in two types according to the design of their edge. Straight edge can be used with lead and felt pens, whereas when technical pen is used the edge must be grooved to prevent the spread of the ink. Diagram 5 – Ruler A compass (diagram 3) (or pair of compasses) is a technical drawing instrument that can be used for drawing circles or arcs. As dividers, they can also be used as tools to measure distances, in particular on maps. Compasses can be used for mathematics, drafting, navigation, and other purposes.

Set Squares are used to draw accurate angles. The most common set squares are 45 degrees and 60/30 degrees. When using set squares they should always be used along with a T-Square. The Set-square rest on the straight edge of the T-Square and this ensures that the angle is drawn straight and with accuracy. Diagram 4 – Set squaresIt is easier to erase graphite that has been gently applied to the surface of the paper because the graphite is lying on top of the paper tooth. When you bare down on the pencil it not only flatten the tooth of the paper damaging it, but also force graphite into the micro texture of the paper. No amount of erasing can get into these micro pores so you will always have a ghost image remaining after erasing. First kneading: a bit stiff, had to twist it to get it to move, held together like gum except when I stretched it more than 2cm then would form fine threads that had little bits caught in it that fell out like snow, so I felt I was losing bits of the rubber. This was prevented by only using a twisting or pressing motion, not a stretching motion. Then it was fine. Second kneading of small piece next day: fine. A protractor is used to measure angles. A typical protractor is a semi-circular piece of plastic with 180 degrees printed around its curve. This piece of equipment is not only used in graphics for constructing accurate drawings but is also used in subjects like Mathematics. Also available for graphics is a full circle protractor which can be used to accurately measure angles greater than 180 degrees. Diagram 1 – 180 degree protractor Dark graphite and coloured pencil can best be removed by using two steps: press/lift with a putty rubber until no more will come off and then finish with a plastic or rubber eraser. For clean, smudge-free results, resist the urge to brush the eraser crumbs off with your hand as this can cause unwanted smudging and blowing the crumbs off can add dampness to the paper. Instead, a good habit to get into is to lift the paper and shake the crumbs off. A drawing broom/drafting brush can be really useful.

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