Over the last few days, since my last post, I have been cutting out and trimming all the parts required for the command sphere. Trimming off the tabs and all traces of the black line surrounding the parts has taken a lot of time and eye strain.
Also, all the parts have been 'water shaped' as outlined earlier. When dampened and placed into the plastic half ball, the semi inflated plastic kids ball is pressed down into the shell with force. This causes the kids ball to expand outwards, compressing the paper part against the plastic 'half a ball' shell . I placed a very heavy weight on this and left it overnight to dry. Once removed from the shell the part now has a curved profile matching the curvature of the shell.
Anybody that may be interested in the concept of water shaping paper should read this excellent info here:
http://www.langorigami.com/paper/wetfolding_papers.php
Once all the parts were trimmed and shaped, assembly could begin!
Each hemisphere of the sphere has 4 distinct longitudinal sections divided by darker recessed bands.
These 4 sections are shown here (this photo was taken at Wonderfest 2008, and judging by the texturing on the model, I think this is where UHU02 got his inspiration from.)
Sections 1 and 2 are made from 1 piece each.
Section 3 is made from two bands joined in the middle.
Section 4 is made up of 4 separate bands.
Sections 1 & 2 are simply two rings. These are joined at the ends and then water shaped. Simple.
As shown earlier, all the parts (bands) of sections 3 & 4 are tacked together roughly and then water shaped.
I was concerned about deforming the surface of the ball by using glue on the backing strips that join the bands together. I had this problem before when I attempted the sphere the first time. As the glue softened the paper, the impressions of the tabs/backing strips showed on the surface. This just would not do, if I wanted a smooth, unblemished ball!
I was sitting at work mulling over how I was going to join the bands without surface marking. I work for one of the largest document archive companies in Europe, and we use barcodes printed on stickers for all containers and documents stored here. The manufacturer of the stickers guarantees that the glue on these stickers will stay stuck for at least 75 years!
BINGO!!! 75 years will outlive me, that's for sure! So, with this in mind, I decided to use thin strips of these stickers to join the bands of each individual section. The stickers stick like $h1t to a blanket and of course no glue is needed. Therefore, no glue, no surface marks!!!
The strips I cut to about 6mm wide x 15mm long. I started joining the bands by first accurately lining up various printed texture lines and sticking a sticker strip behind. Doing it this way ensured that the texture lines lined up across the bands. It was then just a case of filling up the spaces between with strips until all the bands were joined together.
It is important to make sure that the join is as snug and tight together as possible. As you progress you can 'feel' the paper pulling itself into form. It is a case of letting the paper take it's own form without forcing it. Of course, having the parts pre-shaped helps immensely while doing this.
This photo shows the parts for the top 3 sections of the sphere, pre-shaped and joined ready for final assembly.
All the notches on the edges of the rings were cut out before assembly. The black bands were cut and trimmed from spare copies of parts sheets. These black bands are to be recessed lower than the main panels.
This pic shows the (almost) complete upper section. I left off the top most part (section 1) for now, as the resulting hole provides an entry point for a finger or thumb when assembling the parts. This I will attach later when the whole hemisphere has been assembled.
The shape and form is looking nice and round and smooth!!!
The main section (4) was assembled next, in the same way.
You will notice in the pic above that the join line of section 3 is a bit rough. I overcame this problem by burnishing the join from behind to flatten the join more. This was done by placing the assembled part into the plastic shell that I used for water shaping and using a rounded wooden handle to achieve this. As the plastic shell is clear, you can watch what you are doing and where you are burnishing by looking at the surface of the parts from the outside.
This pic shows the difference between burnished (left) and un-burnished joins (right.)
Once I had completed the assembly of section 4 of the upper hemisphere, I used the plastic shell as a support and very carefully cut out the opening for the windows, ensuring that the cut lines were perfectly straight and that all the red print was removed. I also cut out holes for where I am going to add recessed detail to the surface later on.
I then joined section 4 to sections 1,2 & 3 to complete the shell of the upper hemisphere.
This pic shows the 'sticker hell' on the inside of the assembled shell.
And, ladies and gentlemen (and others,) this is the completed upper hemisphere.
I am VERY pleased with the end result.
I am now working on the lower hemisphere and will be back over the next day or two with more progress.
Take care and stay tuned!!