CC 1420 LECTURE 6: POLAROID TROUBLE SHOOTING – UNDER/OVER-EXPOSED IMAGE

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INTRODUCTION
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Controlling the exposure value (EV) could be really challenging to both beginners and experienced users. Sometimes you may find it difficult to correctly set the exposure wheel. This may result in over/ under-exposed shots.

Impossible film can be mainly classified into two types: high ISO (600) and low ISO (SX-70). Many people are confused about HOW to take a correctly exposed picture.

 

PART 1.

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Tips about setting the brightness

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To use 600 film in a default ISO100 camera(e.g. SX-70 Model 1, Model 2, Sonar, Alpha)

⇒ Use Flash (half power)/ Turn the exposure wheel all the way to darken (black) / Use ND filter

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To Use SX-70 film in default ISO100 camera

⇒ In normal case, you should keep the exposure wheel in the middle position

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To use 600 film in default ISO600 camera (e.g.SLR670a/SLR680)

⇒ In normal case, you should keep the exposure wheel in the middle position

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To use SX-70 film in default ISO600 camera

⇒ Turn the exposure wheel all the way to lighten (white)

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PART 2.

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Reasons of Under/Over-exposed image

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Film to use corresponding to indoor/ outdoor?

You are suggested to use flash high ISO film (600) indoor and low ISO film (100) outdoor. If you plan to take pictures in both indoor and outdoor, you should use low ISO film and use flash if necessary.

In a condition of very bright light, even when you use SX-70 film (ISO100 film), it is still possible to result in over-exposed images. There are 2 solutions: adjust the exposure wheel to darken, or use an ND filter and keep the exposure wheel in the middle position.

Most of the SX-70 cameras are programmed as ISO100. In most cases you should use corresponding SX-70 film (ISO100 film) as this will ensure the image is correctly exposed. If you want to use 600 film (approx. 6 times more light sensitive than SX-70 film) in your SX-70 camera, you need to put an ND filter before shooting or you will get over-exposed images.

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Temperature differs?

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Photo tends to look pale and with low contrast under cold weather.

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Shield after shooting?

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Impossible film tends to be sensitive to light. Shield the picture immediately after ejection and avoid exposure under the Sun or bright light. You can use the darkslide (the black cover that ejects immediately after you insert a new film pack) to cover the image. Or even better, use Impossible Frog Tongue to make the shielding easier. Once it is ejected, leave the picture face down for 10 minutes for Impossible B&W films, and 30 minutes for colour films. This will largely increase the successful rate of developing nice pictures.

 

REMARKS

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  1. Frog Tongue is available for all boxtype/ folding SX-70 and Image/Spectra cameras.

2. The light bulbs on top of SX-70 is the original Polaroid Flash Bar. It is a disposable flash with a 10-times use flashbulb unit. Suitable for SX-70 Camera/ OneStep Rainbow. These flash bars are no longer manufactured and have been gradually replaced by electronic flash.

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That’s why MINT created MiNT Flash Bar 2, which is a revolutionary re-usable high quality electronic flash bar device for all Polaroid folding and box-type SX-70 type cameras. It comes with 2 filters for your creativity.

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3. Lens Set for Polaroid SX-70 Cameras is also available. The set includes Fisheye, Close-up, Blue filter, Yellow filter, and ND filter. You can get as close as 12cm, take selfies with friends, get the nice blue colour of the sky, create higher contrast in B&W photos, and shoot 600 film in SX-70 cameras. It is definitely another must have item besides the flash.

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CC 1420 Lecture 1: Film storage – How to keep film in good condition

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AFTER PURCHASE
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When you purchase a fresh pack of film for your Polaroid camera, normally an unopened package is allowed to store for 12 months. For opened film, better to finish photographing within a month.

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Optimum range of temperature for Impossible Project film storage is between 15°C – 20°C (59°F – 68°F). As the film is super sensitive to light, avoid any exposure to sunlight. Otherwise it may cause undesirable chemical reaction.

For Fujifilm instant color film, keep it in the fridge at temperature below 10°C (50°F). Opened film packs can also be kept in the fridge by placing them into polyethylene or vinyl bags.

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Store your films in a cool place and avoid sunlight. Do not store your films in damp proofing box – film chemicals will dry and will no longer develop images. Before use, try to settle to room temperature if the film is placed in the fridge. If you use the film while it is still cold, the photo quality may be adversely affected by condensation.

 

AFTER CARE
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(In short run) Shading

When the photo is ejected immediately after photographing, that will be the critical moment! Shield it from light immediately.

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When developed film is exposed to strong light, the image will increase it brightness by approximately two stops. Somehow this will ruin the picture.

The best and most effective approach is to use a Frog Tongue. The frog tongue will essentially cover the photo when it is ejected, leaving it no chance at all to encounter light. Or a more economical way is to tape a black card on top of the picture exit slot. It acts similar to the frog tongue but it could be annoying to tape on and off.

After ejection, do not leave the film under direct sunlight while it is still developing. Also, do not bend, fold, or put pressure on the photo or else may cause unevenness on the image.


(In short run) Development

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Keep shielding the image from light when developing. In about 15 minutes, the image will nearly be developed and stabilised.instant-university_yellow-border

(In long run) Location

The quality of finished images will change during storage. The key is to store the image in a cool place, preferably the fridge (not freezer).
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(In long run) Temperature

Storing in crisper drawer is the optimum solution for image stability. Do not store the film under 0°C / 32°F as this may devastate images.

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(In long run) Meth
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A. Make good use of your fridge

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For the best results, put the photos in the fridge for 1 to 2 weeks. The temperature and humidity in crisper drawers (where to store fruits) can slower down the speed of changing colour and is effective to keep the color on films. After 2 weeks, you will find the pictures become rigid and stiff, that means the pictures have already “cooled down” and can exhibit like normal.

For Fujifilm, keep images in a dark dry and well-ventilated location away from gases. You don’t need to keep Fujifilm in the fridge like Impossible Project film.

B. Emulsion lift

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It is about removing the emulsion layer from a sheet of Polaroid / Impossible or Fuji film and transferring it onto other surfaces such as clothing, painting paper, mug etc. After that the image is forever kept. During the process of emulsion lift, you can even enlarge or change the shape of the image. Special kit is needed for emulsion lift.

C. Air the chemical

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Some will cut out 2 blank boxes behind Polaroid / Impossible image so as to fasten up the speed of drying chemicals. But after a certain period of time, the image will fade especially Black & White photos. Moreover, the back of image is unavoidably damaged thus many photographers avoid using this method.