https://peertube.dngr.us/videos/watch/a589684a-bab9-48ae-bf12-69ade52ffeee For more information about Linotype history check out the documentary by Doug Wilson! https://linotypefilm.com/ This film "Casting Good Type" (1958) features an easy-to-understand series of diagrams showing how the Monotype casts type from molten metal as well as the correct way to clean dross out of type metal. 00:00 Common type casting issues described. 1:20 Metal quality is paramount. Suppliers use X-ray spectrometers for precise analysis to ensure specification adherence 3:32 Proper metal handling. 4:57 Skimming dross and avoiding excessive heat (above 700°F). 5:27 Persistent lacy skin indicates zinc contamination 6:13 Pinkish-blue tinges signal excess copper. 7:15 Careless caster operatives fail to properly drill nozzles daily. 8:14 Proper nozzle drilling requires specific drill sizes and careful measurement. 9:22 Carelessness also leads to broken drills. 9:53 Weekly disassembly and cleaning of all components. 11:26 Snappy handling of the pump body is crucial. 12:28 Special tools clean valve seating, bushes, and well arm passages, ensuring cleanliness up to the nozzle space. 13:16 Reassembly requires heating the pump body and piston in molten metal before tightening, and a trace of piston paste on the nozzle thread is permissible. 13:50 Following recommended routines and having a clean spare pump prevents production interruptions. 14:44 A mispositioned nozzle can lead to a "till spot," sluggish injection, and freezing. 15:05 Adjustments require reducing metal level, cleaning the pump arm's pin seating, and checking the do pin's condition. 16:21 A nozzle gauge is used to check nozzle entry into the cone hole; if it binds, the melting pot's position must be adjusted using securing nuts and adjusting screws. 17:28 A wooden wedge holds the pump body's position during adjustments. 17:57 The nozzle squaring post checks vertical alignment; leaning indicates wear in pump body lugs or bearings, requiring replacement. 19:32 After adjustments, the nozzle position is re-checked with packing, ensuring free movement without lifting the pump. 20:46 A visual representation highlights the pump and piston mechanisms, clarifying how adjustments impact their working. 21:16 The pump trip assembly drives the bell crank, raising crossheads, pump body springs, and the piston operating rod. 22:17 This action releases the pump body operating rod lever, allowing lifting springs to act on the pump lifting levers. 22:42 The pump, pump lever, piston lever, and crossheads rise until the nozzle seats in the mold, fixing the pump lever's position. 23:34 Only the piston mechanism travels further, with the link pin acting as a pivot, driving metal to the mold. 26:39 Piston spring pressure is set; increased pressure may indicate issues in the pump or nozzle seating. 29:26 Check sample types for porosity and frosted faces, which can also be caused by low mold temperature. 29:54 Excessive heat can cause type heads to pull off leading to matrix hammering and burring. 30:26 Less acute heat issues can stretch type, causing heavy printing. 30:58 Oil spoils type, causing pitted faces, necessitating clean matrices and careful handling. 31:16 Precautions include examining, storing, and checking matrices for damage, cleaning them with a soft brush and volatile oil solvent. 32:17 Dirt in cone holes causes misalignment; wear indicates draw rod/centering pin conflict, requiring adjustment. 33:10 Printers remelting used type must exclude zinc or brass and unknown metals, using standard reviving metals to restore tin and antimony lost to oxidation. 33:52 Melting quantities of at least 300 lbs of type are recommended at 700-750°F. 35:24 Coarse grain metal forms a heavy crust in the caster pot that won't disperse even with high heat. 35:40 Regular metal analysis by the supplier using a spectrograph detects minute impurities and deviations from specification. 36:48 Good type production requires metallurgical knowledge, mechanical adjustment skills, typographical recognition, and thorough, conscientious cleaning. 37:26 These qualifications lead to efficient machine performance and a life free from anxiety and frustration. 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