Process¶

System Ideation¶

Modular components

Generator interface - to produce vector or 3d files to be used downstream
BioMaterial Recipes - to come to a suitable biocomposite material with required properties
Production workflow - a biopaste printer to fabricate the designs, and other pre- and post-processes for production
The Garment - structurally designed to fulfill the listed functions, while also fulfilling aesthetic, emotional, and behavioural requirements.

The following pages describe the path taken for all the aspects of the project, including the research, ideation and execution of each of them, as well as any files and other information. While the process of doing these was more chaotic in reality, and interwoven across time, for clarity, I am presenting them individually along the same structure as the weekly exercises. The rest of this page tells the overarching story into which these fit in.

Over the course of the project, some aspects took a back seat - for e.g. the BioPrinter - and new aspects that weren't in the initial plan came up - like the structural explorations, which I had assumed would be a part of the garment design, but needed to take a life of their own.

//write the story of your process, how you did it //may need to happen after the individual process steps since story will have to knit them all together.

BioMaterial recipes and extruder¶

I did the first round of BioMaterial recipes trying out various combinations of cellulose and binders, but also testing for vertical height achieved and stability. Part of my initial ambition for this project was also to build a paper or biopaste 3d printer, primarily using cellulose or bagasse. #SpinoffProject!

In one of the mentoring sessions, it was pointed out that I needn't worry about height, since while a full-fledged biopaste printer would need to build height, my application required nominal thickness deposited over a surface. The relaxation of that requirement, obvious in hindsight, meant that I "merely" needed a plotter with an extrusion head instead of a 3-axis printer.

To work on the extrudability of mixtures and nozzle dynamics, I tried out a couple of bio-gun builds, as well as designing and building one of my own. I also attempted to build a biopaste printer anyway, based on a clay printer from Fablab Barcelona. Eventually, I stalled this whole line of action since there were enough separate requirements for this project that needed to be worked out, beyond the scope of the current project.

Read about the BioMaterial work here and the BioGun builds here

Generator and Interface¶

The Generator interface was designed, executed and interated over a 3-4 day trip we took to Kochi, in the South of India, to visit the Kochi Biennale. Since I could not work on physical materials, I utilised the cafe-evenings to work on the interface.

The initial sketch for the belt and cummerbund designs was done by handcoding in p5.js. Later I passed my core code to ChatGPT to generate the UI elements - sliders and radio buttons and the rest, as well as finetuning their layouts.

This is a strategy I have used previously for some other tool pages, since I thoroughly enjoy working out the logic and coding it, but find making UI elements tiresome. I'm also not a fan of laying out the HTML and CSS of pages, nor do I have the skill to be fast or efficient at it.

Read about the Generator Interface here

Auxetic Structures¶

I was also interested in using Auxetic structures within the project, since I knew I'd require some expansion-contraction structures to allow bending and flexibility. The biomimetic inspiration of Pangolin and Armadillo shells that incorporated both hard materials but also bending would require similar structures to be translated.

I tested various auxetic patterns and structures. I think I got enough knowledge and experience to help me later when doing the structural designs. But in itself, I realised, cut patterns in a base materual would not be the first line of designing my outcome. Introducing breaks in a material, while allowing varied kinds of motions and flexibility, also inherently weakens it, and the strength required by the belt could not be compromised. However, it did tell me that having weaker/stretchier areas vs rigid, non-deformable areas was a potentially good direction.

Read about the Auxetics study here

Recentering¶

At this point, it had started to become late into the project timeline, and I took a step back to take a hard look at everything. I realised that I had extended myself and the project in too many directions, and not all of them were going to be achieved, nor were they necessary, after a point. The uncertainities of the extruder machine were weighing me down and blocking me from the parts I was looking forward to work on as well.

I talked to my mentor, Anastasia, to drop doing the belt and focus on the machine, since most of the work I had done until that point was with the biomaterial recipes and the extruder. However, she stongly advised against it, since the Belt was the intended outcome of the project and hence anchored it. Without that, I would have no goal to test decisions against, and would continue to go in circles (instead of spirals!)

I took her advice. I decided to focus on designing the belt as a garment with all it's requirements. A few days later I dropped doing the machine entirely, since there were to many uncertainties and many things to do before it could take off. I also froze the interface where it was, since it offered a fair proof of concept and further improvements would need me to design the belt structure anyway.

Redesign¶

//requirements //sketches //structural basis for sketches //overall design

Structural Testing¶

Since the primary requirement of the belt was a controlled bending - preventing bending and curling over in some directions, and allowing flexibility in others - I decided to test a series of shapes in a rigid-pliable combination.

I initially did this by 3d printing on fabric. This was closest to what I had initially planned with the extruder - to print a mix of rigid-setting and softer, more bendable materials, based on geometric and mechanical considerations. Or alternately to print the rigid-setting material on fabric directly. These ideas had been reinforced by the auxetic studies as well.

3D printing on fabric offered similar material properties that could then be tested. I printed on stretchable fabric as well as normal non-stretch fabric.

This offered me enough insight to then design further with better materials, since PLA or other 3D printed plastics were never an intended material.

Since I had abandoned the bio-paste printer, I turned to casting the pieces in lasercut molds. This was from a suggestion left in the feedback sheet from an older presentation session, but it came back to me when I needed a different production process.

This time I limited myself to Gelatin as binder and Bagasse cellulose as filler, since that was the most promising combination from the previous round of material testing. However, I tested various ratios of Gelatin to Filler to Glycerin to understand how the properties changed based on the proportions. This was done for both, a hard and rigid material as well as a softer, more flexible material.

I created hard pieces that were then embedded in a soft high-glycerin matrix as a second pour, as well as incorporating fabric as a base material combined with the soft biocomposite.

While the results were interesting and I eventually made one full-size belt using the gelatin-cellulose biocomposite, I wasn't too sure of the material. Hence, I switched to other techniques for achieving the structural properties.

I then tried using thin plywood on fabric to achieve the hard-soft combination. Thsi was done by either stitching the pieces onto the fabric, gluing them onto the fabric, or both. The stitching allowed certain kinds of slidable movements since the entire piece wasn't locked to the fabric. But eventually I settled on gluing them since the relative movement that stitching allowed was causing more problems than benefits. This version is what I finally chose to execute the belt with.

Later, I also tried combining this with the biocomposite by casting the flexible material onto the fabric that held the wood pieces, but did not proceed with that.

Read about the BioComposite structures here and the Wood Fabric composites here

The first Farankenstein¶

The rest of the pieces¶

Finishing touches¶

Belt and clasps
Stencilled patterns

Mentoring notes¶

Mentors in all sessions may share with you their comments, notes, advise, projects and technical equipment to check out. This is good place to share those, so that you can find them later on when you need them the most!

Half-fabrication files¶

Test file: 3d modelling test ↩