dichotomy Posted February 9, 2022 Posted February 9, 2022 Hey guys. Anyone ever see something like this before? Is it something CGC would like to review? Cheers.
theCapraAegagrus Posted February 9, 2022 Posted February 9, 2022 Is this an error because of poor printing, or did the slab screw it up? dichotomy 1
zzutak Posted February 9, 2022 Posted February 9, 2022 This is what happens when the shear stress that develops between the inner well and the ink layer exceeds the shear strength between the ink layer and the underlying cover stock. Why did the shear stress develop? The comic moved downward while its top edge was "stuck" to the inner well. My degree of confidence in this explanation? 99.999% silverseeker, Randall Dowling, dichotomy and 1 other 4
joeypost Posted February 9, 2022 Posted February 9, 2022 That and the book may have contained too much moisture when initially encased. dichotomy, silverseeker, Randall Dowling and 1 other 4
dichotomy Posted February 9, 2022 Author Posted February 9, 2022 Much obliged for the feedback. I had figured the cause - I’m more curious about how prevalent this problem may be. I also did figure it might be poor printing on this issue/batch, and excess moisture at the time of slabbing is also an interesting consideration.
theCapraAegagrus Posted February 9, 2022 Posted February 9, 2022 On 2/9/2022 at 9:11 AM, zzutak said: This is what happens when the shear stress that develops between the inner well and the ink layer exceeds the shear strength between the ink layer and the underlying cover stock. Why did the shear stress develop? The comic moved downward while its top edge was "stuck" to the inner well. My degree of confidence in this explanation? 99.999% Would you consider it a condition of poor storage? dichotomy and steveinthecity 2
Mr. Zipper Posted February 9, 2022 Posted February 9, 2022 That is something else. Thanks for sharing... I've never seen it before. Is it possible there was also an issue with the ink that resulted in adhesion problems? dichotomy 1
zzutak Posted February 9, 2022 Posted February 9, 2022 Joe's explanation is completely reasonable. Moisture can increase the "grip" between the inner well and the cover (compare the effort required to slide moist versus dry paper on a smooth countertop or desktop). Moisture can also weaken the bond between the ink layer and the underlying cover stock (think partial delamination). Remember, failure occurs when stress exceeds strength, so the root cause of this failure could be due to either excessive shear stress or inadequate shear strength (perhaps due to a manufacturing anomaly that resulted in poor adherence between the cover ink and underlying cover stock along the top edge). dichotomy and silverseeker 2
Popular Post joeypost Posted February 9, 2022 Popular Post Posted February 9, 2022 On 2/9/2022 at 9:34 AM, zzutak said: Joe's explanation is completely reasonable. Moisture can increase the "grip" between the inner well and the cover (compare the effort required to slide moist versus dry paper on a smooth countertop or desktop). Moisture can also weaken the bond between the ink layer and the underlying cover stock (think partial delamination). Remember, failure occurs when stress exceeds strength, so the root cause of this failure could be due to either excessive shear stress or inadequate shear strength (perhaps due to a manufacturing anomaly that resulted in poor adherence between the cover ink and underlying cover stock along the top edge). The truth is that it is most likely a combination of all these things. But I have seen shearing, tearing and ink loss due to the inner well fitting poorly. dichotomy, zzutak, theCapraAegagrus and 2 others 4 1
zzutak Posted February 9, 2022 Posted February 9, 2022 Absolutely. Without a thorough forensic analysis, we may never know whether failure was due to a weak ink-to-stock bond, improper/poor encapsulation, an unfortunate/unforeseen post-encapsulation event (like dropping the slab), or a combination of thereof. dichotomy and theCapraAegagrus 1 1
djzombi Posted February 10, 2022 Posted February 10, 2022 On 2/9/2022 at 9:47 AM, joeypost said: The truth is that it is most likely a combination of all these things. But I have seen shearing, tearing and ink loss due to the inner well fitting poorly. Well, that's a big YIKES.
