Measuring For Window Blinds

measuring for window blinds

    window blinds
  • A window blind is a type of window covering which is made with slats of fabric, wood, plastic or metal that adjust by rotating from an open position to a closed position by allowing slats to overlap. A roller blind does not have slats but comprises a single piece of material.

  • Ascertain the size and proportions of (someone) in order to make or provide clothes for them

  • measurement: the act or process of assigning numbers to phenomena according to a rule; "the measurements were carefully done"; "his mental measurings proved remarkably accurate"

  • (measure) how much there is or how many there are of something that you can quantify

  • Be of (a specified size or degree)

  • (measure) any maneuver made as part of progress toward a goal; "the situation called for strong measures"; "the police took steps to reduce crime"

  • Ascertain the size, amount, or degree of (something) by using an instrument or device marked in standard units or by comparing it with an object of known size

measuring for window blinds - Measuring Penny

Measuring Penny

Measuring Penny

Lisa has an important homework assignment--to measure something in several different ways. She has to use standard units like inches and nonstandard units like paper clips to find out height, width, length, weight, volume, temperature, and time. Lisa decides to measure her dog, Penny, and finds out ...

Penny's nose = 1 inch long
Penny's tail = 1 dog biscuit long
Penny's paw print = 3 centimeters wide

... and that's only the beginning! Lisa learns a lot about her dog and about measuring, and even has fun doing it.

This clear and engaging concept book, delivered with a sense of humor, is certain to win over the most reluctant mathematician.

87% (9)

Rodinal/Shanghai Development Comparion

Rodinal/Shanghai Development Comparion

If you're not into techy stuff please tune out now...

I was interested to see what effect different exposure/development combinations had on a scanned image.

The photos above was taken on a sunny day with my spot meter reading between EV17 on the brightest window blind and EV10 on the door in shadow. All the images were all taken at f11 developed for various times in 1+50 Rodinal RO9 at 20C. A pre-rinse was used. Agigation was one inversion every 30 seconds, with 5 initial agitations. Massive Dev chart suggests 18 minutes for Shanghai GP3 /Rodinal combination. This is taken with the Shanghai sheet film you buy on ebay, it is implied it is the same formulation as GP3 other people suggest it's supposed to be a knock off of FP4.

I metered the picture using my spot meter at EV14 which gave a nominal exposure of 1/60" at f11 assuming 100 iso. I confirmed the exposure with my Canon 1000d set at 100iso.

During scanning I assigned the maximum brightness to the blind and the minimum brightness to the window in the garage door (in shade). I don't ususally work with this method but it seemed a good way to get a consistent tone assignment.

Observations. Although changing the development time/exposure had an effect on the density of the image, I was surprised to see it didn't make a huge difference to the final scanned image. I measured the contrast using difference between the brightest and darkest parts of the image using the scanner. The range for the brightness was 172 to 178 (arbitary units).

The smallest density range was 1/30" developed for 9 minutes.
The largest density range was 1/60" develped for 15 minutes.

The dark band seen on the right of the 1/30" for 9 minutes image was due to the film not being fully immersed in the developer (put the film holder in the tank the wrong way up - duh!).

I noted that 2 of the images were quite badly out of focus. I conculde from this that I need to improve the way I load the sheet film into the film holders. I don't think have been getting the film captured properly in the film holders, one egde is probably slipping into the channel for the dark slide.

I will probably go for a development time of 12 minutes exposing at 100 iso or 9 minutes exposing at 50 iso in future.

I used an epson v500 scanner (only bothered scanning 2/3 of the image for speed (and it's not a very exciting image!)

[5709] Bow Works

[5709] Bow Works

Bow Works, Pomona Street, c 1891.
For James Chesterman and Co Ltd.

James Chesterman (1792-1867) moved to Sheffield from London in 1820. Nine years later he patented the spring tape measure. He also invented the self-winding window blind, produced the first long steel Measuring tape and the first woven metallic tape. His business adopted the bow as its trademark, and he named his factory the Bow Works which moved to this site in 1864.
James Chesterman & Co became synonymous with high quality measuring instruments, especially tapes, callipers and squares. In 1963 amalgamation with John Rabone & Sons created Rabone Chesterman, who were subsequently bought by Stanley Tools and transferred to Stanley's Woodside Plant. Bow Works was refurbished and extended for its new occupants, Norwich Union, now Aviva, in 1993.

measuring for window blinds

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  • 2017⁄08⁄01(火)
  • 09:27