ORIGINALLY DESIGNED BY A CALLIGRAPHER, FOR ALL CALLIGRAPHERS
Back in 1997, a person named Milton Ferrari, invented and patented an instrument to help calligraphers in their calligraphy work. For example, writing addresses on thick envelopes, writing text on opaque paper, place cards, invitations, etc. This device came as an alternative to the light table that couldn’t help in the situations mentioned above. With that in mind, he came up with a device that could project lines on a sheet of paper. He called this invention PROJETOR DE SOMBRA, translated to English means SHADOW CASTER or SHADOW PROJECTOR.
By using a light source and a guide sheet of lines attached to two supports, you could project lines on the paper, eliminating the need to draw lines directly on the writing surface that later would be erased. Drawing lines, a technique commonly used by calligraphers, although effective is time-consuming. This also sometimes inevitably leaves pencil marks on paper after being erased and could potentially smudge your work. This device not only saves time by not drawing the lines, but makes the process a lot easier, faster and more accurate.
From that, the UMBRACAST was born, a simplification of his original design, but still sturdy, clean and elegant.
The overall idea behind this, is for you to be able to take your caster to an on-site job and still look like a design feature until you turn on the light and magic happens.
At home, it makes it easier to store by simply having it on display in your office or studio.[/mk_fancy_title]
In Portugal, the use of the words umbra and penumbra are now a rarity. I remember as a child hearing the word penumbra from my great grandfathers. Nowadays, these words are fading away from our vocabulary.[/mk_fancy_title]
For that we decided to keep the wing nut and bolts just, as it was in the original design. Giving it not only a piece of history, but also an industrial look to it.[/mk_fancy_title]
After a series of thorough tests, the 5mm crystal-clear acrylic emerged as the best choice and delivered the best result.
We are offering 2 options, a 29-cm length acrylic, good for portrait A4 sheets or C5 envelopes. And a 36-cm length acrylic, for landscape A4 sheets or anything that requires more room in the middle. Personally, I have only used the 29-cm plate for my everyday work and it’s perfect. But if your work demands more than that, we recommend the 36-cm length one![/mk_fancy_title]
Over the years i tested hundreds of light bulbs and lamps till i found something good enought for this device. A focused light where the shadow is confined to a single spot and doesn’t spread too much. I found that a small single LED light, without a frosted glass in the front, and ideally with more them 500lm will do the work.
Here are our list of lamps and lightbulbs that will work in a descender order.
If you find any other lamp or light bulb, in your country, that works please let me know and i will add it to this list.
We are also working on a prototype for a lamp, but that will take a little bit longer to finish.[/mk_fancy_title]
Lumens: 1000 + lm
IMPORTANT: don’t get the USB version. It’s not strong enough.[/mk_fancy_title]
Just unscrew the front part, take the glass off and screw it back and it done.
EGLO PITTY 8903[/mk_fancy_title]
From what we worked on, a minimum distance of 60cm between the light source and the guide line is necessary. This will give an increment of the x-height of +/- 0,5mm, so if the grid is 3mm x-height, the projection will be +/- 3,5mm.
Generally i like to work in the office with my lamp 1,3meters away from it because it gives me a really sharp line, almost like it was printed on the paper. The increment is close to +/- 0,1mm, so in the case of a grid with 3mm x-height, the projection will be +/- 3,1mm.[/mk_fancy_title]