# Last edited on 2018-06-17 01:47:55 by jstolfi
# Points on graph by Solvay Inc
# https://www.solvay.us/en/binaries/Soda_Ash_Conversion_Guide-237418.pdf
# Horizontal axis: temperature {t} Fahrenheit.
# Verical axis: mass percentage {p} of Na2CO3.

# Scale (x0 y0) (t0 p0) (x1 y1) (t1 p1):
= 72 966  0 0  1132 84  240 100

# Points on solubility curve:
* 216 966
* 198 921
* 207 916
* 250 896
* 295 869
* 339 838
* 383 799
* 427 753
* 468 704
* 471 699
* 488 683
* 502 671
* 515 672
* 559 675
* 603 678
* 648 682
* 692 684
* 736 687
* 780 689
* 824 691
* 868 693
* 912 694
* 956 696
* 1000 696
* 1044 694
* 1082 693
* 1120 697

# Straight lines:
- 502 209 502 271
- 1082 209 72 209
- 502 558 72 558
- 468 558 468 704
- 468 640 72 640
- 198 640 198 966
- 1082 84 1082 693