@pindac,
First good news that your getting good results (as expected).
Referencing - Vinyl Record Manual Cleaning Process (thevinylpress.com), the pre-clean step (if using Alconox Liquinox) is where you can get some foam as noted Figure 15; and most of the foam should be in brush The final clean step that uses only a non-ionic surfactant will not foam excessively as noted Figure 17.
I do not know what Ultrasound Solution is so unable to access what it may do or what harm it may do. The noise between tracks is essentially the silent groove(s). The background noise of the silent groove 'can' be inherent to the record material surface roughness - and this surface roughness can be specific to the specific pressing plant; or it may be tightly adherent small particles
If you want you can try this very simple step as an additional pre-clean step to be performed after the first pre-clean with Alconox (or whatever detergent you are using). Pre-clean with White Distilled Vinegar 5% acidity (use no other). To 500 mL add 2-3 drops Tergitol 15-S-9. The 15-S-9 makes the vinegar a wetting solution. Gently spray each side of the record and then gently spread with the brush making sure the record is fully wetted; and then gently agitate for 2-4 minutes. After which rinse with flowing tap water to remove and then follow with final clean and rinse as specified in Chapter V.
White distilled vinegar is a weak acid (acetic) but its also very pure - it comes from ethanol and is also known as ethanolic acid so it has almost no NVR. The weak acid is used to dissolve small inorganic mineral salt particles that are attached tightly to the record that detergents may not remove (I discuss this Chapter IV Figure 10). I now use white distilled vinegar (+ drops of 15-S-9) as the 2nd pre-clean step and have had good to excellent results with over 50 records. More details will be provide when the book 3rd edition is issued late this year or next.
Good Luck
Neil
First good news that your getting good results (as expected).
Referencing - Vinyl Record Manual Cleaning Process (thevinylpress.com), the pre-clean step (if using Alconox Liquinox) is where you can get some foam as noted Figure 15; and most of the foam should be in brush The final clean step that uses only a non-ionic surfactant will not foam excessively as noted Figure 17.
I do not know what Ultrasound Solution is so unable to access what it may do or what harm it may do. The noise between tracks is essentially the silent groove(s). The background noise of the silent groove 'can' be inherent to the record material surface roughness - and this surface roughness can be specific to the specific pressing plant; or it may be tightly adherent small particles
If you want you can try this very simple step as an additional pre-clean step to be performed after the first pre-clean with Alconox (or whatever detergent you are using). Pre-clean with White Distilled Vinegar 5% acidity (use no other). To 500 mL add 2-3 drops Tergitol 15-S-9. The 15-S-9 makes the vinegar a wetting solution. Gently spray each side of the record and then gently spread with the brush making sure the record is fully wetted; and then gently agitate for 2-4 minutes. After which rinse with flowing tap water to remove and then follow with final clean and rinse as specified in Chapter V.
White distilled vinegar is a weak acid (acetic) but its also very pure - it comes from ethanol and is also known as ethanolic acid so it has almost no NVR. The weak acid is used to dissolve small inorganic mineral salt particles that are attached tightly to the record that detergents may not remove (I discuss this Chapter IV Figure 10). I now use white distilled vinegar (+ drops of 15-S-9) as the 2nd pre-clean step and have had good to excellent results with over 50 records. More details will be provide when the book 3rd edition is issued late this year or next.
Good Luck
Neil