Showing posts with label glass. Show all posts
Showing posts with label glass. Show all posts

Saturday, February 20, 2016

Furniture Materials

Furniture Design Materials
The versatile material of wood used to full effect in this furniture design

Wood is the most versatile, renewable and sustainable resource on the planet which is why wood is also the most commonly used material in the creation of furniture. As wood is an organic material and can be native to specific regions you may find that different woods are traditionally more commonly used for furniture in different countries. Nowadays, with the cost of travel and transport at an all time low these different woods are imported and exported at a much higher rate and the options for furniture makers are at an all time high. New, man made 'woods' have also added to the variety of options available and it is up to the furniture maker to decide which wood is best for any given project. Other materials are of course used for either structural or aesthetic properties and they are also discussed here. Browse the list below to learn about the qualities and common uses of each type of furniture material.


Cedar:
Cedar is a reddish soft wood native to Lebanon, western Syria and south central Turkey where it is traditionally used in the making of Venetian Blinds. It has a distinctive sweet odour which is why it is extensively used in chest making, closet lining and household novelties. It is very easy to work with, uniform in texture and is also resistant to decay leading to its use as an outdoor house shingle.

Cherry:
Cherry is close grained hard wood that resists warping and shrinking well. The native range of the wild cherry extends through most of Europe, western Asia and parts of northern Africa. Cherry wood reddens when it is exposed to sunlight. It ages well and is extensively used in cabinet making, boat trim, novelties and solid furniture handles.

Chestnut:
Chestnut is a hard wood native to temperate regions of the Northern Hemisphere. There are numerous variations, the most popular of which is Spanish Chestnut. Chestnut wood loses it's durability when grown beyond 50 years so it is difficult to get large, long timber from it. It has always been highly valued for small outdoor furniture pieces, where durability is important, as well as fencing and wooden shingles for covering buildings, it is also used to make barrels.

Chipboard:
Chipboard is an artificial wood made like MDF but from actual wood chips, hence the name. It is widely used for the structural casing of kitchen furniture and cabinets which are then covered with a laminate or wood veneer. It is also widely used for low cost sub flooring. It is only useful in sheet form and cannot be easily used or worked in any other format.

Elm:
Elm is valued for its interlocking grain which gives it a high resistance to splitting, with significant uses in chair seats and coffins. Elm wood is also it quite pliant and is available in long planks due to the long, straight, trunks of the tree, For these reasons elm is favoured as a source of timber for keels in ship construction. Elm was historically used by bowyers during the Middle Ages to make longbows.

Fir:
Fir is a fast growing soft wood which is uniformly textured and has a very low resistance to rotting and decay. It is easy to work and finishes well. Fir is used for making furniture, doors, picture frames, window frames, general millwork and as an interior trim. It is also a main component of plywood.

Glass:
Glass in its ordinary form will break under pressure into sharp shards, and is therefore not suitable for use in furniture. Toughened glass is formed from a prepared sheet of ordinary glass which has been heated and then rapidly cooled with cold air, this heating and rapid cooling process results in the outer surfaces contracting and solidifying before the interior, thereby inducing permanent compressive stresses into the surfaces of the glass. This type of glass is suitable for use in furniture manufacture and can even be bent and curved.

Hemlock:
Hemlock is a lightweight softwood that is native to the North American continent but is also grown in Europe. It machine cuts well due to the wide grain and rarity of knots. It is uniformly textured and has a low resistance to decay. It is mainly used as a construction timber for planks, door panels, sub flooring and transportation crates.

Lime:
Lime is a hard wood native to Britain that is a pale yellow colour, which gradually darkens over time. Lime has excellent carving properties and it is especially favoured for delicate work by master woodcarvers. Seasoned lime is very stable and is soft enough to be carved and yet firm enough to hold a precisely cut surface well. Lime also stains well, has good bending properties and is often used for making furniture.

Mahogany:
Mahogany is finely grained hard wood which is reddish brown color. It is extremely durable and resists swelling, shrinking, warping and twisting. Mahogany is used extensively for high quality, expensive furniture such as wooden cabinets and veneered tables and dressers. It is also used in the construction of boats due to its high resistance to swelling and warping caused by water.

Maple:
Maple is a fine textured hard wood native to Asia with immense strength and hardness. With moderate shrinkage, maple machines well and is best used in flooring, fine furniture and hard wearing surfaces such as bowling alley lanes. Maple is a very light coloured wood and it is sometimes even bleached before finishing to make it even whiter.

Medium Density Fibre Board (MDF):
MDF is an artificial wood made from powdered wood bonded with glue and compressed to form sheets usually 2400mm x 1200mm in size. It is quite soft, fairly pliable and very easy to work with. It cuts, sands and finishes very easily. It is used widely for interior projects especially for cupboards and shelving. Due to its nature it is highly recommended to wear a face mask when sanding MDF as the particles are tiny and easily inhaled.

Oak:
Oak is a hard wood, light in colour, which has good pliable qualities despite its durable nature. It stains and finishes well and resists moisture absorption. Oak is great for furniture, for which it is commonly used, due to its natural aesthetic qualities as well as its strenght. It is also used for boat framing, wooden desks and flooring.

Pine:
Pine is a fast growing soft wood native to Scandinavia. It has a uniform texture and is very easy to work with. It finishes well and resists shrinkage, swelling and warping despite having a wide grain. It is widely used in the construction of timber frame houses, panelling, mass produced furniture, wood pallets and numerous other items. It is one of the most widely used timbers in the world and is so fast growing that it is 'farmed' in countries all over the world.

Plywood:
Plywood is an artificial wood that was invented during the Second World War and was primarily used to build boats and landing craft for the military. It is made from numerous thin laminates of wood glued together. Each layer is at right angle to the grain of the other to give it great strength while also allowing it to remain quite pliable. The thinner the sheet, the more pliable it will be. It is used widely in the building industry as a sub flooring material or as a structural casing between walls.

Plastic:
Plastic is an artificial material that was created in 1862 in London. The material was originally called Parkesine was an organic material derived from cellulose that once heated could be moulded, and retained its shape when cooled. It has since been developed greatly with numerous variations but its original properties remain its most valuable. The ability to mould plastic into any form has made it a very popular material for mass produced furniture but also for modern bespoke furniture where any shape or form is possible.

Redwood:
Redwood is native to a narrow strip of land along the lower west coast of America. It is light but relatively durable softwood that is easy to work with. It has a good natural resistance to rotting and decay and is therefore commonly used for making outdoor furniture, fencing and house panelling. It is named for it's colour, a deep pinky, red hue through the wide grain.

Rosewood:
Rosewood is tight grained hard wood with dark reddish brown color. It is hard to work with and requires a lot of polishing to achieve a good finish. It is commonly used for making musical instruments such as pianos, as well as tool handles, sculptures, veneers and furniture. It has also has a uniquely pleasant fragrance which sets it apart from most other woods.

Spruce:
Spruce is a relatively strong soft wood native to Scandanavia that finishes well but has a low resistance to rotting and decay. It possesses moderate shrinkage and is light in colour and weight. It is a good option for making masts and spars for ships, aircraft, crates, boxes, general millwork and ladders due to its favourable strength to weight ratio.

Steel:
Steel, especially tubular steel, became popular as a furniture making material after the popularity of the Wassily Chair, also known as the Model B3 chair, which was designed by Marcel Breuer in 1925-1926 while he was the head of the cabinet-making workshop at the Bauhaus, in Dessau, Germany. This modern designed showcased the potential use of tubular steel as a structural as well as an aesthetic material which gave added options to furniture designers in terms of what unusual support sytems were now possible.

Teak:
Teak is a renowned hard wood that is very moisture resistant. It resists warping, cracking and decay and is used in a wide variety of ways that make use of its extreme strenght and hard wearing qualities, these include furniture, panelling, window frames, ship building, church doors and flooring. It is also sometimes used as a construction timber for its load bearing capabilities, for example, as a cross beam.

Walnut:
Walnut is a hard word that is fine in texture, dark in colour and strong yet easy to work. It resists shrinking and warping and can take numerous types of finishes as it takes stains and glazes very well. It is used mainly for making solid and veneered furniture, cabinets, wall panelling and decorative novelty trinkets. The English Walnut actually originated in Persia, and the Black walnut is native to the United States.


*Having read this you also find our Furniture Design Styles or Furniture Joinery articles useful.

Friday, January 29, 2016

Curves in Blender

Wine Glass made from Curves in Blender
Wine Glass made from Curves in Blender
In Blender there are 2 types of curve. The name of these 2 curves are Bezier and NURBS (Non-Uniform Rational B-Spline) Curves. These two curves can be used to create 2-D and 3-D objects with complex curves such as cars, bottles and many other things.

Bezier Curves have no tangent and are connected to the line. NURBS do not have tangents and their curve control points are not connected to the line. When choosing between the two it is best to go for the one you feel most comfortable using, although Bezier Curves are considered easier to control due to the control points being on either side of the line, while NURBS Curves are easier for the computer to calculate efficiently.


Bezier Curve
NURBS Curve

Curves are used to model the outline of a shape or object. Curves can be 2-D or 3-D. 3-D curves can be mapped to anywhere in the 3-D space but 2-D curves are restricted to staying in the X and Y plane. Curves are 2-D by default when you bring them into a scene.

Bezier Curve

To get a Bezier Curve press ('Shift' + 'A'), select curve then Bezier Curve. It helps to press ('7') on number pad to get a better view. Pressing ('Tab') gives brings you into Edit Mode. Once pressed you will see a Black line with two pink lines on either side and other smaller black lines that look like legs coming off the larger black line. At each end of the pink lines there are 2 orange dots, these are control points and are used to alter the curve of the line.

Bezier Curve in Edit Mode
The position and length of the pink lines can be manipulated by right clicking any of the control points. Changing the position alters the direction of the curve while changing length alters the curve of the line.

NURBS Curve

To get a NURBS Curve press ('Shift' + 'A'), select the curve option and then choose NURBS Curve. Next it helps to go into a top-down view by pressing ('7') on the number pad as it gives you a better view of the curve. Press ('Tab') to bring the curve into edit mode. This should show something similar to the Bezier Curve except instead of two pink lines there is one yellow line broken into 3 segments. On the yellow line are 4 orange control points that allow you to manipulate the curve to the shape you require.
NURBS Curve in Edit Mode

Moving the orange control points on the X-Axis increase the length of the curve while moving it in the Y-Axis changes the bend in the curve. This is similar to the Bezier Curve.


*To turn of the lines that look like legs on your curve press 'N' then un-tick the box that says Normal underneath Curve Display.*


Properties of Curves

The properties of curves can be altered in the side panel to suit your preferences. Everything from    2-D to 3-D, resolution, twisting, path/curve deform and fill can be adjusted in this panel.

Curve Properties Panel

2-D and 3-D Curves

When you bring a new curve into a scene it automatically comes into the scene in 2-D. This can be changed so that curves are 3-D when they are brought into a scene. To do this just switch press either the 2D or 3D button in panel under curves.

2D or 3D Curve Option

Scaling Curves

Curves can be made bigger by selecting the curve and pressing 'S' on the keyboard. The curve can -now be made bigger by moving the mouse, once you left-click the screen the curve will stay the size that you left it.

Scaled Bezier Curve

Hotkeys for Curves

New Curve: For a new curve press 'Shift' + 'A' and under the curve option select the curve type you want.

Enter Edit Mode: Press the 'Tab' button to enter Edit mode.

Top-Down View: Press number '7' on the number pad to go into top-down view giving you a better view of the curve.

Subdivide a Curve: Select two parts of a curve segment and press 'W' to divide the curve into two new segments.

Join Separate Curves: Highlight the curves and press 'CTRL' + 'J'.

Fill: To fill a closed curve press 'Ctrl' + 'J'.

Tilt a Curve: To tilt a curve select an endpoint and press 'CTRL' + 'T' and move the mouse.

Convert Curve to Mesh: To convert a curve to a mesh press 'ALT' + 'C'.

Extrude a line: To extrude a line select the point you want to extrude from and press 'E'.

How to Make a 3-D Wine Glass using Bezier Curves

First open a new Blender file and delete the starting cube. Next press numbers '5' and '7' on the number pad to go into a top-down orthographic view. This will give you a better perspective of things in the scene.

Top Orthographic View

Next press 'Shift' + 'A' then select Curve, then select Bezier Curve. This will add the Bezier Curve to the scene. You can change the resolution of the curve if you wish underneath the Curve Panel. This technique can be used for many similar objects but for the purpose of this tutorial I decided on doing a wine glass as it is simple and easy to do.

Outline of Glass

Next in order to get the 360 degree object that you are looking for you will want to go to the right hand panel and click on the modifiers panel. Click add 'Add Modifier' and add a 'Screw Modifier'. Under Apply switch the Axis to the X-Axis.

Add Screw Modifier
Move the different parts of your object around until you are happy with its appearance. This is what my wine glass ended up looking like.

Finished Glass





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